# US 2014/0154240 A1 · Pyrazolo[1,5-a]pyrimidines for antiviral treatment

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- Number: US 2014/0154240 A1
- Document ID: US20140154240A1
- Status: Published application
- Kind: A1
- Application number: 13/905,410
- Filed: 2013-05-30
- Published: 2014-06-05
- Earliest claimed: 2010-06-24
- Assignees: Gilead Sciences, Inc.
- Applicants: Gilead Sciences, Inc.
- Inventors: Kerim Babaoglu; Constantine G. Boojamra; Eugene J. Eisenberg; Hon Chung Hui; Richard L. Mackman; Jay P. Parrish; Michael Sangi; Oliver L. Saunders; Dustin Siegel; David Sperandio; Hai Yang
- Web page: https://patentgrep.com/patent/US20140154240A1

## CPC

- C07D 487/04: Ortho-condensed systems
- A61K 31/519: ortho- or peri-condensed with heterocyclic rings
- A61K 31/5377: not condensed and containing further heterocyclic rings, e.g. timolol
- A61K 31/55: having seven-membered rings, e.g. azelastine, pentylenetetrazole
- A61K 31/551: having two nitrogen atoms, e.g. dilazep
- A61K 31/675: having nitrogen as a ring hetero atom, e.g. pyridoxal phosphate
- A61K 45/06: Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
- A61P 11/00: Drugs for disorders of the respiratory system
- A61P 31/12: Antivirals
- A61P 31/14: for RNA viruses
- A61P 31/16: for influenza or rhinoviruses
- C07D 495/04: Ortho-condensed systems
- C07D 513/04: Ortho-condensed systems
- C07D 519/00: Heterocyclic compounds containing more than one system of two or more relevant hetero rings condensed among themselves or condensed with a common carbocyclic ring system not provided for in groups C07D453/00 or C07D455/00
- C07F 9/65616: {containing the ring system [IMAGE cpc-sch-C07F-1006.gif] having three or more than three double bonds between ring members or between ring members and non-ring members, e.g. purine or analogs}
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- C07F: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM (metal-containing porphyrins C07D487/22)

## Abstract

The invention provides compounds of Formula I or Formula II: or a pharmaceutically acceptable salt or ester, thereof, as described herein. The compounds and compositions thereof are useful for treating Pneumovirinae virus infections. The compounds, compositions, and methods provided are particularly useful for the treatment of Human respiratory syncytial virus infections.

## Claims

### Claim 1

A compound of Formula I or Formula II:
or a pharmaceutically acceptable salt or ester, thereof;
wherein:
A is —(C(R4)2)n— wherein any one C(R4)2 of said —(C(R4)2)n— may be optionally replaced with —O—, —S—, —S(O)p—, NH or NRa;
n is 3, 4, 5 or 6;
each p is 1 or 2;
Ar is a C2-C20 heterocyclyl group or a C6-C20 aryl group, wherein the C2-C20 heterocyclyl group or the C6-C20 aryl group is optionally substituted with 1 to 5 R6;
X is —C(R13)(R14)—, —N(CH2R14)— or X is absent;
Y is N or CR7;
each R1, R2, R3, R4, R5, R6, R7 or R8 is independently H, oxo, OR11, NR11R12, —NR11C(O)R11, NR11C(O)OR11, NR11C(O)NR11R12, N3, CN, NO2, SR11, S(O)pRa, NR1S(O)pRa, —C(═O)R11, —C(═O)OR11, —C(═O)NR11R12, —C(═O)SR11, —S(O)p(OR11), —SO2NR11R12, —NR11S(O)p(OR11), —NR11SOpNR11R12, NR11C(═NR11)NR11R12, halogen, (C1-C8)alkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl;
two R4 on adjacent carbon atoms, when taken together, may form a double bond between the two carbons to which they are attached or may form a (C3-C7)cycloalkyl ring wherein one carbon atom of said (C3-C7)cycloalkyl ring may be optionally replaced by —O—, —S—, —S(O)p—, —NH— or —NRa—;
four R4 on adjacent carbon atoms, when taken together, may form an optionally substituted C6 aryl ring;
two R4 on the same carbon atom, when taken together, may form a (C3-C7)cycloalkyl ring wherein one carbon atom of said (C3-C7)cycloalkyl ring may be optionally replaced by —O—, —S—, —S(O)p—, —NH— or —NRa—;
two R6 on adjacent carbon atoms, when taken together, may form a (C3-C7)cycloalkyl ring wherein one carbon atom of said (C3-C7)cycloalkyl ring may be optionally replaced by —O—, —S—, —S(O)p—, —NH— or —NRa—;
any R6 adjacent to the obligate carbonyl group of said Ar, when taken together with R3, may form a bond or a—(C(R5)2)m— group wherein m is 1 or 2;
any R6 adjacent to the obligate carbonyl group of said Ar, when taken together with R2, may form a bond;
each Ra is independently (C1-C8)alkyl, (C1-C8)haloalkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl wherein any (C1-C8)alkyl, (C1-C8)haloalkyl, (C2-C8)alkenyl or (C2-C8)alkynyl of Ra is optionally substituted with one or more OH, NH2, CO2H, C2-C20 heterocyclyl, and wherein any aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl of Ra is optionally substituted with one or more OH, NH2, CO2H, C2-C20 heterocyclyl or (C1-C8)alkyl;
each R11 or R12 is independently H, (C1-C8)alkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl, (C4-C8)carbocyclylalkyl, —C(═O)Ra, —S(O)pRa, or aryl(C1-C8)alkyl; or R11 and R12 taken together with a nitrogen to which they are both attached form a 3 to 7 membered heterocyclic ring wherein any one carbon atom of said heterocyclic ring can optionally be replaced with —O—, —S—, —S(O)p—, —NH—, —NRa- or —C(O)—;
R13 is H or (C1-C8)alkyl;
R14 is H, (C1-C8)alkyl, NR11R12, NR11C(O)R11, NR11C(O)OR11, NR11C(O)NR11R12, NR11S(O)pRa, —NR11S(O)p(OR11) or NR11SOpNR11R12; and
wherein each (C1-C8)alkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl of each R1, R2, R3, R4, R5, R6, R7, R8, R11 or R12 is, independently, optionally substituted with one or more oxo, halogen, hydroxy, NH2, CN, N3, N(Ra)2, NHRa, SH, SRa, S(O)pRa, ORa, (C1-C8)alkyl, (C1-C8)haloalkyl, —C(O)Ra, —C(O)H, —C(═O)ORa, —C(═O)OH, —C(═O)N(Ra)2, —C(═O)NHRa, —C(═O)NH2, NHS(O)pRa, NRaS(O)pRa, NHC(O)Ra, NRaC(O)Ra, NHC(O)ORa, NRaC(O)ORa, NRaC(O)NHRa, NRaC(O)N(Ra)2, NRaC(O)NH2, NHC(O)NHRa, NHC(O)N(Ra)2, NHC(O)NH2, ═NH, ═NOH, ═NORa, NRaS(O)pNHRa, NRaS(O)pN(Ra)2, NRaS(O)pNH2, NHS(O)pNHRa, NHS(O)pN(Ra)2, NHS(O)pNH2, —OC(═O)Ra, —OP(O)(OH)2 or Ra.

### Claim 2 (depends on 1)

The compound of claim 1 which is a compound of Formula I.

### Claim 3 (depends on 1)

The compound of claim 1 wherein each R3 is H.

### Claim 4 (depends on 1)

The compound of claim 1 which is a compound of Formula VII or a compound of Formula VIII:
or a pharmaceutically acceptable salt or ester, thereof.

### Claim 5 (depends on 4)

The compound of claim 4 which is a compound of Formula VII.

### Claim 6 (depends on 1)

The compound of claim 1 wherein R2 is H.

### Claim 7 (depends on 1)

The compound of claim 1 wherein R7 is H, halogen or (C1-C8)alkyl.

### Claim 8 (depends on 1)

The compound of claim 1 wherein n is 3 or 4.

### Claim 9 (depends on 1)

The compound of claim 1 wherein each R4 is independently H or optionally substituted (C1-C8)alkyl, or four R4 on adjacent carbon atoms, when taken together, may form an optionally substituted C6 aryl ring.

### Claim 10 (depends on 1)

The compound of claim 1 wherein A is —(CH2)3—, —(CH2)4—, —CH2—O—CH2—, —CH2—CH(CH3)—CH2—, —CH2—CH(CF3)—CH2—, —CH2—CH2—CH(CH3)— or the structure:

### Claim 11 (depends on 1)

The compound of claim 1 wherein A is —(CH2)3—.

### Claim 12 (depends on 1)

The compound of claim 1 wherein X is —CR13(NR11C(O)OR1)—, —CR13(NR11R12)—, —CR13(NR11S(O)pRa)— or X is absent.

### Claim 13 (depends on 1)

The compound of claim 1 wherein X is absent.

### Claim 14 (depends on 1)

The compound of claim 1 wherein R1 is H, OR11, NR11R12, CN, (C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl or (C3-C7)cycloalkyl, wherein any (C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl or (C3-C7)cycloalkyl of R1 is optionally substituted with one or more oxo, halogen, hydroxy, NH2, CN, N3, N(Ra)2, NHRa, SH, SRa, S(O)pRa, ORa, (C1-C8)alkyl, (C1-C8)haloalkyl, —C(O)Ra, —C(O)H, —C(═O)ORa, —C(═O)OH, —C(═O)N(Ra)2, —C(═O)NHRa, —C(═O)NH2, NHS(O)pRa, NRaS(O)pRa, NHC(O)Ra, NRaC(O)Ra, NHC(O)ORa, NRaC(O)ORa, NRaC(O)NHRa, NRaC(O)N(Ra)2, NRaC(O)NH2, NHC(O)NHRa, NHC(O)N(Ra)2, NHC(O)NH2, ═NH, ═NOH, ═NORa, NRaS(O)pNHRa, NRaS(O)pN(Ra)2, NRaS(O)pNH2, NHS(O)pNHRa, NHS(O)pN(Ra)2, NHS(O)pNH2, —OC(═O)Ra, —OP(O)(OH)2 or Ra.

### Claim 15 (depends on 1)

The compound of claim 1 wherein R1 is H or C2-C20 heterocyclyl, wherein any C2-C20 heterocyclyl of R1 is optionally substituted with or more oxo, halogen, hydroxy, NH2, CN, N3, N(Ra)2, NHRa, SH, SRa, S(O)pRa, ORa, (C1-C8)alkyl, (C1-C8)haloalkyl, —C(O)Ra, —C(O)H, —C(═O)ORa, —C(═O)OH, —C(═O)N(Ra)2, —C(═O)NHRa, —C(═O)NH2, NHS(O)pRa, NRaS(O)pRa, NHC(O)Ra, NRaC(O)Ra, NHC(O)ORa, NRaC(O)ORa, NRaC(O)NHRa, NRaC(O)N(Ra)2, NRaC(O)NH2, NHC(O)NHRa, NHC(O)N(Ra)2, NHC(O)NH2, ═NH, ═NOH, ═NORa, NRaS(O)pNHRa, NRaS(O)pN(Ra)2, NRaS(O)pNH2, NHS(O)pNHRa, NHS(O)pN(Ra)2, NHS(O)pNH2, —OC(═O)Ra, —OP(O)(OH)2 or Ra.

### Claim 16 (depends on 1)

The compound of claim 1 wherein R1 is selected from:

### Claim 17 (depends on 1)

The compound of claim 1 wherein R1 is H or:

### Claim 18 (depends on 1)

The compound of claim 1 wherein Ar is a C6-C20 aryl group, wherein the C6-C20 aryl group is optionally substituted with 1 to 5 R6.

### Claim 19 (depends on 1)

The compound of claim 1 wherein Ar is phenyl optionally substituted with 1 to 5 R6.

### Claim 20 (depends on 1)

The compound of claim 1 wherein each R6 is independently selected from OR11, NR11R12, NR11C(O)R11, NR11C(O)OR11, CN, NR11S(O)pRa, —C(═O)NR11R12NR11SOpNR11R12, halogen, (C1-C8)alkyl, (C2-C8)alkynyl, C6-C20 aryl, C2-C20 heterocyclyl and (C3-C7)cycloalkyl, wherein any C1-C8)alkyl, (C2-C8)alkynyl, C6-C20 aryl, C2-C20 heterocyclyl and (C3-C7)cycloalkyl of R6 is optionally substituted with one or more oxo, halogen, hydroxy, NH2, CN, N3, N(Ra)2, NHRa, SH, SRa, S(O)pRa, ORa, (C1-C8)alkyl, (C1-C8)haloalkyl, —C(O)Ra, —C(O)H, —C(═O)ORa, —C(═O)OH, —C(═O)N(Ra)2, —C(═O)NHRa, —C(═O)NH2, NHS(O)pRa, NRaS(O)pRa, NHC(O)Ra, NRaC(O)Ra, NHC(O)ORa, NRaC(O)ORa, NRaC(O)NHRa, NRaC(O)N(Ra)2, NRaC(O)NH2, NHC(O)NHRa, NHC(O)N(Ra)2, NHC(O)NH2, ═NH, ═NOH, ═NORa, NRaS(O)pNHRa, NRaS(O)pN(Ra)2, NRaS(O)pNH2, NHS(O)pNHRa, NHS(O)pN(Ra)2, NHS(O)pNH2, —OC(═O)Ra, —OP(O)(OH)2 or Ra.

### Claim 21 (depends on 1)

The compound of claim 1 wherein each R6 is independently selected from NR11S(O)pRa, NR11C(O)OR11, NR11C(O)R11, (C1-C8)alkyl and halogen.

### Claim 22 (depends on 1)

The compound of claim 1 wherein Ar is:

### Claim 23 (depends on 1)

The compound of claim 1 wherein Ar is:

### Claim 24 (depends on 1)

The compound of claim 1 wherein R8 is H, NR11R12, NR11C(═NR11)NR11R12, halogen, (C1-C8)alkyl, (C2-C8)alkynyl, C6-C20 aryl, C2-C20 heterocyclyl or (C3-C7)cycloalkyl, wherein any (C1-C8)alkyl, (C2-C8)alkynyl, C6-C20 aryl, C2-C20 heterocyclyl, or (C3-C7)cycloalkyl of R8 is optionally substituted with one or more oxo, halogen, hydroxy, NH2, CN, N3, N(Ra)2, NHRa, SH, SRa, S(O)pRa, ORa, (C1-C8)alkyl, (C1-C8)haloalkyl, —C(O)Ra, —C(O)H, —C(═O)ORa, —C(═O)OH, —C(═O)N(Ra)2, —C(═O)NHRa, —C(═O)NH2, NHS(O)pRa, NRaS(O)pRa, NHC(O)Ra, NRaC(O)Ra, NHC(O)ORa, NRaC(O)ORa, NRaC(O)NHRa, NRaC(O)N(Ra)2, NRaC(O)NH2, NHC(O)NHRa, NHC(O)N(Ra)2, NHC(O)NH2, ═NH, ═NOH, ═NORa, NRaS(O)pNHRa, NRaS(O)pN(Ra)2, NRaS(O)pNH2, NHS(O)pNHRa, NHS(O)pN(Ra)2, NHS(O)pNH2, —OC(═O)Ra, —OP(O)(OH)2 or Ra.

### Claim 25 (depends on 1)

The compound of claim 1 wherein R8 is C2-C20 heterocyclyl, wherein C2-C20 heterocyclyl is optionally substituted with one or more oxo, halogen, hydroxy, NH2, CN, N3, N(Ra)2, NHRa, SH, SRa, S(O)pRa, ORa, (C1-C8)alkyl, (C1-C8)haloalkyl, —C(O)Ra, —C(O)H, —C(═O)ORa, —C(═O)OH, —C(═O)N(Ra)2, —C(═O)NHRa, —C(═O)NH2, NHS(O)pRa, NRaS(O)pRa, NHC(O)Ra, NRaC(O)Ra, NHC(O)ORa, NRaC(O)ORa, NRaC(O)NHRa, NRaC(O)N(Ra)2, NRaC(O)NH2, NHC(O)NHRa, NHC(O)N(Ra)2, NHC(O)NH2, ═NH, ═NOH, ═NORa, NRaS(O)pNHRa, NRaS(O)pN(Ra)2, NRaS(O)pNH2, NHS(O)pNHRa, NHS(O)pN(Ra)2, NHS(O)pNH2, —OC(═O)Ra, —OP(O)(OH)2 or Ra.

### Claim 26 (depends on 1)

The compound of claim 1 wherein R8 is pyrrolidinyl or azetidinyl, wherein pyrrolidinyl or azetidinyl is optionally substituted with one or more hydroxy, NH2, CN or —OP(O)(OH)2.

### Claim 27 (depends on 1)

The compound of claim 1 wherein R8 is:

### Claim 28 (depends on 1)

The compound of claim 1 wherein R8 is:

### Claim 29 (depends on 1)

The compound according to claim 1 selected from the group consisting of:
and pharmaceutically acceptable salts and esters thereof.

### Claim 30 (depends on 1)

The compound according to claim 1 selected from the group consisting of:
and pharmaceutically acceptable salts and esters thereof.

### Claim 31 (depends on 1)

The compound of claim 1 which is a compound as described in any one of Examples 258-412, or a pharmaceutically acceptable salt or ester thereof.

### Claim 32

A pharmaceutical composition comprising a compound of Formula IX:
or a pharmaceutically acceptable salt or ester thereof and a pharmaceutically acceptable carrier.
wherein:
A is —(C(R4)2)n— wherein any one C(R4)2 of said —(C(R4)2)n— may be optionally replaced with —O—, —S—, S(O)p—, NH or NRa;
n is 3, 4, 5 or 6;
each p is 1 or 2;
Ar is a C2-C20 heterocyclyl group or a C6-C20 aryl group, wherein the C2-C20 heterocyclyl group or the C6-C20 aryl group is optionally substituted with 1 to 5 R6;
X is —(CR13R14)—, —N(CH2R14)— or X is absent;
Y is N or CR7;
each R1, R2, R3, R4, R5, R6, R7 or R8 is independently H, oxo, OR11, NR11R12NR11C(O)R11, NR C(O)OR11, NR11C(O)NR11R12, N3, CN, NO2, SR11, S(O)pRa, NR11S(O)pRa, —C(═O)R11, —C(═O)OR11, —C(═O)NR11R12, —C(═O)SR11, —S(O)p(OR11), —SO2NR11R12, —NR11S(O)p(OR11), —NR11SOpNR11R12, NR11C(═NR11)NR11R12, halogen, (C1-C8)alkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl;
two R4 on adjacent carbon atoms, when taken together, may form a double bond between the two carbons to which they are attached or may form a (C3-C7)cycloalkyl ring wherein one carbon atom of said (C3-C7)cycloalkyl ring may be optionally replaced by —O—, —S—, —S(O)p—, —NH— or —NRa—;
four R4 on adjacent carbon atoms, when taken together, may form an optionally substituted C6 aryl ring;
two R4 on the same carbon atom, when taken together, may form a (C3-C7)cycloalkyl ring wherein one carbon atom of said (C3-C7)cycloalkyl ring may be optionally replaced by —O—, —S—, —S(O)p—, —NH— or —NRa—;
two R6 on adjacent carbon atoms, when taken together, may form a (C3-C7)cycloalkyl ring wherein one carbon atom of said (C3-C7)cycloalkyl ring may be optionally replaced by —O—, —S—, —S(O)p—, —NH— or —NRa—;
any R6 adjacent to the obligate carbonyl group of said Ar, when taken together with R3, may form a bond or a —(C(R5)2)m— group wherein m is 1 or 2;
any R6 adjacent to the obligate carbonyl group of said Ar, when taken together with R2, may form a bond;
each Ra is independently (C1-C8)alkyl, (C1-C8)haloalkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl wherein any (C1-C8)alkyl, (C1-C8)haloalkyl, (C2-C8)alkenyl or (C2-C8)alkynyl of Ra is optionally substituted with one or more OH, NH2, CO2H, C2-C20 heterocyclyl, and wherein any aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl of Ra is optionally substituted with one or more OH, NH2, CO2H, C2-C20 heterocyclyl or (C1-C8)alkyl;
each R11 or R12 is independently H, (C1-C8)alkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl, (C4-C8)carbocyclylalkyl, —C(═O)Ra, —S(O)pRa, or aryl(C1-C8)alkyl; or R11 and R12 taken together with a nitrogen to which they are both attached form a 3 to 7 membered heterocyclic ring wherein any one carbon atom of said heterocyclic ring can optionally be replaced with —O—, —S—, —S(O)p—, —NH—, —NRa- or —C(O)—;
R13 is H or (C1-C8)alkyl;
R14 is H, (C1-C8)alkyl, NR11R12, NR11C(O)R11, NR11C(O)OR11, NR11C(O)NR11R12NR11S(O)pRa, —NR11S(O)p(OR11) or NR11SOpNR11R12; and
wherein each (C1-C8)alkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl of each R1, R2, R3, R4, R5, R6, R7, R8, R11 or R12 is, independently, optionally substituted with one or more oxo, halogen, hydroxy, NH2, CN, N3, N(Ra)2, NHRa, SH, SRa, S(O)pRa, ORa, (C1-C8)alkyl, (C1-C8)haloalkyl, —C(O)Ra, —C(O)H, —C(═O)ORa, —C(═O)OH, —C(═O)N(Ra)2, —C(═O)NHRa, —C(═O)NH2, NHS(O)pRa, NRaS(O)pRa, NHC(O)Ra, NRaC(O)Ra, NHC(O)ORa, NRaC(O)ORa, NRaC(O)NHRa, NRaC(O)N(Ra)2, NRaC(O)NH2, NHC(O)NHRa, NHC(O)N(Ra)2, NHC(O)NH2, ═NH, ═NOH, ═NORa, NRaS(O)pNHRa, NRaS(O)pN(Ra)2, NRaS(O)pNH2, NHS(O)pNHRa, NHS(O)pN(Ra)2, NHS(O)pNH2, —OC(═O)Ra, —OP(O)(OH)2 or Ra.

### Claim 33 (depends on 1)

A pharmaceutical composition comprising a therapeutically effective amount of a compound of claim 1 or a pharmaceutically acceptable salt or ester thereof and a pharmaceutically acceptable carrier.

### Claim 34 (depends on 32, 33)

The pharmaceutical composition of claim 32 or claim 33 further comprising at least one other therapeutic agent selected from ribavirin, palivizumab, motavizumab, RSV-IGIV MEDI-557, A-60444, MDT-637, BMS-433771, ALN-RSV0 or ALX-0171 mixtures thereof.

### Claim 35

A method of treating a Pneumovirinae virus infection in a mammal in need thereof comprising administering to the mammal a therapeutically effective amount of a compound of Formula IX:
or a pharmaceutically acceptable salt or ester thereof,
wherein:
A is —(C(R4)2)n— wherein any one C(R4)2 of said —(C(R4)2)n— may be optionally replaced with —O—, —S—, S(O)—, NH or NRa;
n is 3, 4, 5 or 6;
each p is 1 or 2;
Ar is a C2-C20 heterocyclyl group or a C6-C20 aryl group, wherein the C2-C20 heterocyclyl group or the C6-C20 aryl group is optionally substituted with 1 to 5 R6;
X is —(CR13R14)—, —N(CH2R14)— or X is absent;
Y is N or CR7;
each R1, R2, R3, R4, R5, R6, R7 or R8 is independently H, oxo, OR11, NR11R12, NR11C(O)R11, NR11C(O)OR11, NR11C(O)NR11R12, N3, CN, NO2, SR11, S(O)pRa, NR11S(O)pRa, —C(═O)R11, —C(═O)OR11, —C(═O)NR11R12, —C(═O)SR11, —S(O)p(OR11), —SO2NR11R12, —NR11S(O)p(OR11), —NR11SOpNR11R12, NR11C(═NR11)NR11R12, halogen, (C1-C8)alkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl;
two R4 on adjacent carbon atoms, when taken together, may form a double bond between the two carbons to which they are attached or may form a (C3-C7)cycloalkyl ring wherein one carbon atom of said (C3-C7)cycloalkyl ring may be optionally replaced by —O—, —S—, —S(O)P—, —NH— or —NRa—;
four R4 on adjacent carbon atoms, when taken together, may form an optionally substituted C6 aryl ring;
two R4 on the same carbon atom, when taken together, may form a (C3-C7)cycloalkyl ring wherein one carbon atom of said (C3-C7)cycloalkyl ring may be optionally replaced by —O—, —S—, —S(O)p—, —NH— or —NRa—;
two R6 on adjacent carbon atoms, when taken together, may form a (C3-C7)cycloalkyl ring wherein one carbon atom of said (C3-C7)cycloalkyl ring may be optionally replaced by —O—, —S—, —S(O)p—, —NH— or —NRa—;
any R6 adjacent to the obligate carbonyl group of said Ar, when taken together with R3, may form a bond or a —(C(R5)2)m— group wherein m is 1 or 2;
any R6 adjacent to the obligate carbonyl group of said Ar, when taken together with R2, may form a bond;
each Ra is independently (C1-C8)alkyl, (C1-C8)haloalkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl wherein any (C1-C8)alkyl, (C1-C8)haloalkyl, (C2-C8)alkenyl or (C2-C8)alkynyl of Ra is optionally substituted with one or more OH, NH2, CO2H, C2-C20 heterocyclyl, and wherein any aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl of Ra is optionally substituted with one or more OH, NH2, CO2H, C2-C20 heterocyclyl or (C1-C8)alkyl;
each R11 or R12 is independently H, (C1-C8)alkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl, (C4-C8)carbocyclylalkyl, —C(═O)Ra, —S(O)pRa, or aryl(C1-C8)alkyl; or R11 and R12 taken together with a nitrogen to which they are both attached form a 3 to 7 membered heterocyclic ring wherein any one carbon atom of said heterocyclic ring can optionally be replaced with —O—, —S—, —S(O)p—, —NH—, —NRa— or —C(O)—;
R13 is H or (C1-C8)alkyl;
R14 is H, (C1-C8)alkyl, NR11R12, NR11C(O)R11, NR11C(O)OR11, NR11C(O)NR11R12, NR11S(O)pRa, —NR11S(O)p(OR11) or NR11SOpNR11R12; and
wherein each (C1-C8)alkyl, (C2-C8)alkenyl, (C2-C8)alkynyl, aryl(C1-C8)alkyl, C6-C20 aryl, C2-C20 heterocyclyl, (C3-C7)cycloalkyl or (C4-C8)carbocyclylalkyl of each R1, R2, R3, R4, R5, R6, R7, R8, R11 or R12 is, independently, optionally substituted with one or more oxo, halogen, hydroxy, NH2, CN, N3, N(Ra)2, NHRa, SH, SRa, S(O)pRa, ORa, (C1-C8)alkyl, (C1-C8)haloalkyl, —C(O)Ra, —C(O)H, —C(═O)ORa, —C(═O)OH, —C(═O)N(Ra)2, —C(═O)NHRa, —C(═O)NH2, NHS(O)pRa, NRaS(O)pRa, NHC(O)Ra, NRaC(O)Ra, NHC(O)ORa, NRaC(O)ORa, NRaC(O)NHRa, NRaC(O)N(Ra)2, NRaC(O)NH2, NHC(O)NHRa, NHC(O)N(Ra)2, NHC(O)NH2, ═NH, ═NOH, ═NORa, NRaS(O)pNHRa, NRaS(O)pN(Ra)2, NRaS(O)pNH2, NHS(O)pNHRa, NHS(O)pN(Ra)2, NHS(O)pNH2, —OC(═O)Ra, —OP(O)(OH)2 or Ra.

### Claim 36 (depends on 1)

A method of treating a Pneumovirinae virus infection in a mammal in need thereof comprising administering to the mammal a therapeutically effective amount of a compound of claim 1 or a pharmaceutically acceptable salt or ester thereof.

### Claim 37 (depends on 35, 36)

The method of claim 35 or 36 wherein the Pneumovirinae virus infection is caused by a respiratory syncytial virus.

### Claim 38 (depends on 35, 36)

The method of claim 35 or 36 further comprising administering a therapeutically effective amount of at least one other therapeutic agent or composition thereof selected from the group consisting of ribavirin, palivizumab, motavizumab, RSV-IGIV MEDI-557, A-60444, MDT-637, BMS-433771, ALN-RSV0 and ALX-0171 or mixtures thereof.