# US 2021/0277024 A1 · Naphthyridine compounds and uses thereof

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- Number: US 2021/0277024 A1
- Document ID: US20210277024A1
- Status: Published application
- Kind: A1
- Application number: 17/156,384
- Filed: 2021-01-22
- Published: 2021-09-09
- Earliest claimed: 2018-07-24
- Assignees: Genentech, Inc.
- Applicants: Genentech, Inc.
- Inventors: Terry Kellar; Jun Liang; Sushant Malhotra; Rohan V. Mendonca; Michael Siu; Craig Stivala; John C. Tellis; BinQing Wei; Bryan K. Chan; Lewis J. Gazzard; Timothy Heffron; Graham Jones; Michael Lainchbury; Andrew Madin; Eileen Mary Seward; Matthew W. Cartwright; Emanuela Gancia; David Favor; Kin Chiu Fong; Andrew Good; Yonghan Hu
- Web page: https://patentgrep.com/patent/US20210277024A1

## CPC

- C07D 487/04: 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
- A61P 35/00: Antineoplastic agents
- A61P 37/04: Immunostimulants
- C07D 401/12: linked by a chain containing hetero atoms as chain links
- C07D 403/12: linked by a chain containing hetero atoms as chain links
- C07D 471/04: Ortho-condensed systems
- C07D 487/14: Ortho-condensed systems
- C07D 498/04: Ortho-condensed systems
- C07D: HETEROCYCLIC COMPOUNDS (macromolecular compounds C08)
- A61P: SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS

## Abstract

Naphthyridine compounds of formula (I). variations thereof, and their use as inhibitors of HPK1 (hematopoietic kinase 1) are described. The compounds are useful in treating HPK1-dependent disorders and enhancing an immune response. Also described are methods of inhibiting HPK1, methods of treating HPK1-dependent disorders, methods for enhancing an immune response, and methods for preparing the naphthyridine compounds.

## Claims

### Claim 1

A compound of Formula (I)
or a pharmaceutically acceptable salt thereof, wherein:
R1 is hydrogen, halogen, hydroxyl, C1-6 alkyl optionally substituted with halogen, C3-4 cycloalkyl, or —O(C1-6 alkyl) optionally substituted with halogen;
R2 is (i) or (ii):
(i) a monocyclic 5- or 6-membered heteroaryl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R10; or
(ii) a polycyclic heteroaryl having the formula (a) or (b):
wherein the wavy line represents the attachment point to the parent structure,
Q is CR20, NR21, N, O or S;
T is N or CR22;
Z1 and Z2 are independently N or C, provided at least one of Z1 and Z2 is C;
T1, T2 and T3 are independently N or CR23;
ring A and ring B are independently a C5-8 cycloalkyl or a 5- to 8-membered heterocycle having at least 3 ring-forming carbon atoms and 1, 2 or 3 ring-forming heteroatoms independently selected from the group consisting of N, P, O and S; wherein the C5-8 cycloalkyl and the 5- to 8-membered heterocycle are independently optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10; and wherein two substituents of the C5-8 cycloalkyl or the 5- to 8-membered heterocycle, where present, optionally taken together form a spiro, fused or bridged cycloalkyl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R10 or a sprio, fused or bridged heterocyclyl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R10;
R20, R21, R22 and R23 are each independently hydrogen or R10;
R3 is hydrogen, halogen, cyano, C1-6 alkyl, C3-8 cycloalkyl, 3- to 14-membered heterocyclyl, or —OR7; wherein the C1-6 alkyl, C3-8 cycloalkyl and 3- to 14-membered heterocyclyl of R3 are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10;
R4 is C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-14 aryl, 5- to 14-membered heteroaryl, 3- to 14-membered heterocyclyl, halogen, cyano, —C(O)R6, —C(O)OR7, —C(O)NR8aR8b, —OR7, —OC(O)R6, —OC(O)NR8aR8b, —SR7, —S(O)R9, —S(O)2R9, —S(O)2NR8aR8b, —P(O)R9aR9b, —NR8aR8b, —N(R8)C(O)R6, —N(R8)C(O)OR7, —N(R8)C(O)NR8aR8b, —N(R8)S(O)2R9, or —N(R8)S(O)2NR8aR8b; wherein the C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-14 aryl, 5- to 14-membered heteroaryl and 3- to 14-membered heterocyclyl of R4 are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10;
each R6 is independently hydrogen, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl or 3- to 12-membered heterocyclyl; wherein the C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl and 3- to 12-membered heterocyclyl of R6 are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10;
each R7 is independently hydrogen, C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl or 3- to 12-membered heterocyclyl; wherein the C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl and 3- to 12-membered heterocyclyl of R7 are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10;
each Rg is independently hydrogen or C1-6 alkyl;
each R8a and R8b is independently hydrogen, C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl or 3- to 12-membered heterocyclyl; wherein the C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl and 3- to 12-membered heterocyclyl of R8a and R8b are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10;
or R8a and R8b are taken together with the nitrogen atom to which they are attached to form a 4- to 12-membered heterocyclyl optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10;
each R9 is independently C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl or 3- to 12-membered heterocyclyl; wherein the C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl and 3- to 12-membered heterocyclyl of R9 are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10;
each R9a and R9b is independently C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl, 3- to 12-membered heterocyclyl, or —O—C1-6 alkyl; wherein the C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 14-membered heteroaryl and 3- to 12-membered heterocyclyl of R9a and R9b are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10;
or R9a and R9b are taken together with the phosphorus atom to which they are attached to form a 4- to 12-membered heterocyclyl optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10;
each R10 is independently oxo, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl, 3- to 12-membered heterocyclyl, halogen, cyano, —C(O)Ra, —C(O)ORb, —C(O)NRcRd, —ORb, —OC(O)Ra, —OC(O)NRcRd, —SRb, —S(O)Re, —S(O)2Re, —S(O)(═NH)Re, —S(O)2NRcRd, —NRcRd, —N(Rf2)C(O)Ra, —N(Rf2)C(O)ORb, —N(Rf2)C(O)NRcRd, —N(Rf2)S(O)2Re, —N(Rf2)S(O)2NRcRd, or —P(O)RgRh; wherein the C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-14 aryl, 5- to 14-membered heteroaryl and 3- to 14-membered heterocyclyl of R10 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R11;
each Ra is independently hydrogen, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl or 3- to 12-membered heterocyclyl; wherein the C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 12-membered heterocyclyl of Ra are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R11;
each Rb is independently hydrogen, C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl or 3- to 12-membered heterocyclyl; wherein the C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 12-membered heterocyclyl of Rb are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R11;
each RC and Rd is independently hydrogen, C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl or 3- to 12-membered heterocyclyl; wherein the C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 12-membered heterocyclyl of R and Rd are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R11;
or RC and Rd are taken together with the nitrogen atom to which they are attached to form a 4- to 12-membered heterocyclyl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R11;
each Re is independently C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl or 3- to 12-membered heterocyclyl; wherein the C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 12-membered heterocyclyl of Re are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R11;
each R is independently hydrogen or C1-6 alkyl;
each Rg and Rh is independently C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl, 3- to 12-membered heterocyclyl, or —O—C1-6 alkyl; wherein the C1-6 alkyl, C3-8 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 12-membered heterocyclyl of Rg and Rh are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R11;
or Rg and Rh are taken together with the phosphorus atom to which they are attached to form a 4- to 12-membered heterocyclyl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R11;
each R11 is independently oxo, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl, 3- to 8-membered heterocyclyl, halogen, cyano, —C(O)Ra1, —C(O)ORb1, —C(O)NRc1Rd1, —ORb1, —OC(O)Ra1, —OC(O)NRc1Rd1, —SRb1, —S(O)Re1, —S(O)2Re1, —S(O)2NRc1Rd1, —NRc1Rd1, —N(Rf1)C(O)Ra1, —N(Rf1)C(O)ORb1, —N(Rf1)C(O)NRc1Rd1, —N(Rf1)S(O)2Re1, —N(Rf1)S(O)2NRe1Rd1, or —P(O)Rg1Rh1; wherein the C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-6 cycloalkyl, C6-14 aryl, 5- to 14-membered heteroaryl and 3- to 14-membered heterocyclyl of R11 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R12;
each Ra1 is independently hydrogen, C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl or 3- to 8-membered heterocyclyl; wherein the C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 8-membered heterocyclyl of Ra are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R12;
each Rb1 is independently hydrogen, C1-6 alkyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl or 3- to 8-membered heterocyclyl; wherein the C1-6 alkyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 8-membered heterocyclyl of Rb1 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R12;
each Rc1 and Rd1 is independently hydrogen, C1-6 alkyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl or 3- to 8-membered heterocyclyl; wherein the C1-6 alkyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 8-membered heterocyclyl of Rc1 and Rd1 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R12;
or Rc1 and Rd1 are taken together with the nitrogen atom to which they are attached to form a 4- to 8-membered heterocyclyl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R12;
each Re1 is independently C1-6 alkyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl or 3- to 8-membered heterocyclyl; wherein the C1-6 alkyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 8-membered heterocyclyl of Re are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R12;
each R1 is independently hydrogen or C1-6 alkyl;
each Rg and Rh1 is independently C1-6 alkyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl, 3- to 8-membered heterocyclyl, or —O—C1-6 alkyl; wherein the C1-6 alkyl, C3-6 cycloalkyl, C6-10 aryl, 5- to 10-membered heteroaryl and 3- to 8-membered heterocyclyl of Rg and Rh1 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R12;
or Rg1 and Rh1 are taken together with the phosphorus atom to which they are attached to form a 4- to 8-membered heterocyclyl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R12;
each R12 is independently oxo, C1-6 alkyl, C3-6 cycloalkyl, C6 aryl, 5- to 6-membered heteroaryl, 3- to 6-membered heterocyclyl, halogen, cyano, —C(O)Ra2, —C(O)ORb2, —C(O)NRc2Rd2, —ORb2, —OC(O)Ra2, —OC(O)NRc2Rd2, —S(O)2Re2, —S(O)2NRc2Rd2, —NRc2Rd2, —N(Rf2)C(O)Ra2, —N(Rf2)C(O)ORb2, —N(Rf2)C(O)NRc2Rd2, —N(Rf2)S(O)2Re2, —N(Rf2)S(O)2NRc2Rd2, or —P(O)Rg2Rh2; wherein the C1-6 alkyl, C3-6 cycloalkyl, C6 aryl, 5- to 6-membered heteroaryl and 3- to 6-membered heterocyclyl of R12 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R13;
each Ra2 is independently hydrogen, C1-6 alkyl, C3-6 cycloalkyl, C6 aryl, 5- to 6-membered heteroaryl or 3- to 6-membered heterocyclyl; wherein the C1-6 alkyl, C3-6 cycloalkyl, C6 aryl, 5- to 6-membered heteroaryl and 3- to 6-membered heterocyclyl of Ra2 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R13;
each Rb2 is independently hydrogen, C1-6 alkyl, C3-6 cycloalkyl or 3- to 6-membered heterocyclyl; wherein the C1-6 alkyl, C3-6 cycloalkyl and 3- to 6-membered heterocyclyl of Rb2 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R13;
each Re2 and Rd2 is independently hydrogen, C1-6 alkyl, C3-6 cycloalkyl or 3- to 8-membered heterocyclyl; wherein the C1-6 alkyl, C3-6 cycloalkyl and 3- to 8-membered heterocyclyl of Re2 and Ra2 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R13;
or Re2 and Rd2 are taken together with the nitrogen atom to which they are attached to form a 4- to 6-membered heterocyclyl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R13;
each Re2 is independently C1-6 alkyl, C3-6 cycloalkyl, C6 aryl, 5- to 6-membered heteroaryl or 3- to 6-membered heterocyclyl; wherein the C1-6 alkyl, C3-6 cycloalkyl, C6 aryl, 5- to 6-membered heteroaryl and 3- to 6-membered heterocyclyl of Re2 are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R13;
each R is independently hydrogen or C1-6 alkyl;
each Rg2 and Rh is independently C1-6 alkyl, C3-6 cycloalkyl, 3- to 8-membered heterocyclyl, or —O—C1-6 alkyl; wherein the C1-6 alkyl, C3-6 cycloalkyl, and 3- to 8-membered heterocyclyl of Rg2 and Rh are each optionally substituted with 1, 2, 3 or 4 substituents independently selected from R13;
or Rg2 and R11 are taken together with the phosphorus atom to which they are attached to form a 4- to 6-membered heterocyclyl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R13; and
each R13 is independently oxo, halogen, hydroxyl, —O(C1-6 alkyl), cyano, C1-6 alkyl or C1-6 haloalkyl.

### Claim 2 (depends on 1)

The compound of claim 1, wherein R1 is hydrogen, hydroxy, —O(C1-6 alkyl), or C1-6 alkyl optionally substituted with cyano.

### Claim 3

(canceled)

### Claim 4

(canceled)

### Claim 5 (depends on 1)

The compound of claim 1, wherein R3 is hydrogen or halogen.

### Claim 6 (depends on 1)

The compound of claim 1, wherein R4 is C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-14 aryl, 5- to 14-membered heteroaryl, 3- to 14-membered heterocyclyl, halogen, cyano, —C(O)R6, —C(O)OR7, —OC(O)R6, —OC(O)NR8aR8b, —SR7, —S(O)R9, —S(O)2R9, —S(O)2NR8aR8b, —NR8aR8b, —N(R8)C(O)R6, —N(R8)C(O)OR7, —N(R8)C(O)NR8aR8b, —N(R8)S(O)2R9, or —N(R8)S(O)2NR8aR8b; wherein the C1-6 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-8 cycloalkyl, C6-14 aryl, 5- to 14-membered heteroaryl and 3- to 14-membered heterocyclyl of R4 are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10.

### Claim 7

(canceled)

### Claim 8

(canceled)

### Claim 9 (depends on 1)

The compound of claim 1, wherein R4 is C6-10 aryl, 5- to 10-membered heteroaryl or 5- to 6-membered heterocyclyl; wherein the C6-10 aryl, 5- to 10-membered heteroaryl and 5- to 6-membered heterocyclyl of R4 are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10.

### Claim 10 (depends on 9)

The compound of claim 9, wherein R4 is
wherein the wavy line represents the attachment point to the parent structure, R4a, R4b and R4c are each independently hydrogen or R10, or two vicinal R4(a-c) are taken together with the atoms to which they are attached form a fused 5- or 6-membered heteroaryl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R10 or a fused 5- or 6-membered heterocyclyl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R10.

### Claim 11

(canceled)

### Claim 12

(canceled)

### Claim 13 (depends on 9)

The compound of claim 9, wherein R4 is

### Claim 14

(canceled)

### Claim 15 (depends on 1)

The compound of claim 1, wherein R2 is a polycyclic heteroaryl having the formula (a) or (b):

### Claim 16

(canceled)

### Claim 17 (depends on 15)

The compound of claim 15, wherein R2 is a polycyclic heteroaryl having the formula (a):

### Claim 18 (depends on 17)

The compound of claim 17, wherein R2 is
wherein q is 0, 1, 2, 3, 4, 5 or 6;
Y is C1-4 alkylene wherein optionally one or more of the carbon atoms of the C1-4 alkylene are replaced by a heteroatom selected from oxygen, sulfur and nitrogen, and the C1-4 alkylene is optionally substituted with R10;
R24 is independently hydrogen or R10.

### Claim 19

(canceled)

### Claim 20

(canceled)

### Claim 21 (depends on 17)

The compound of claim 17, wherein R2 is
wherein X is CH2, N, O or S;
n is 1, 2, 3 or 4;
p is 0, 1, 2, 3 or 4;
R24 is hydrogen or R10.

### Claim 22

(canceled)

### Claim 23

(canceled)

### Claim 24

(canceled)

### Claim 25 (depends on 17)

The compound of claim 17, wherein R2 is
wherein q is 0, 1, 2, 3, 4, 5 or 6;
G is independently C or N;
G′ is independently N, NR28, CR29, S or 0;
R28 and R29 are independently hydrogen or R11; or two vicinal groups R28 and R29 are taken together to form a 5- to 6-membered heterocyclyl.

### Claim 26

(canceled)

### Claim 27 (depends on 17)

The compound of claim 17, wherein R2 is selected from the group consisting of

### Claim 28 (depends on 1)

The compound of claim 1, wherein R2 is a monocyclic 5- or 6-membered heteroaryl optionally substituted with 1, 2, 3 or 4 substituents independently selected from R10.

### Claim 29

(canceled)

### Claim 30

(canceled)

### Claim 31 (depends on 28)

The compound of claim 28, wherein R2 is
wherein the wavy line represents the attachment point to the parent structure,
R2a, R2b, R2c and R2d are each independently hydrogen or R10.

### Claim 32

(canceled)

### Claim 33

(canceled)

### Claim 34

(canceled)

### Claim 35 (depends on 28)

The compound of claim 28, wherein R4 is C3-8 cycloalkyl, C6-14 aryl, 5- to 14-membered heteroaryl or 3- to 14-membered heterocyclyl; wherein the C3-8 cycloalkyl, C6-14 aryl, 5- to 14-membered heteroaryl and 3- to 14-membered heterocyclyl of R4 are each optionally substituted with 1, 2, 3, 4 or 5 substituents independently selected from R10.

### Claim 36 (depends on 1)

The compound of claim 1, wherein the compound is selected from the group consisting of Compound Nos. 101-110 and 201-210 in Table 1, or a pharmaceutically acceptable salt thereof.

### Claim 37

(canceled)

### Claim 38 (depends on 1)

A pharmaceutical composition comprising the compound of claim 1, or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable excipient.

### Claim 39

(canceled)

### Claim 40 (depends on 1)

A method of inhibiting HPK1, said method comprising contacting HPK1 in a subject with an effective amount of the compound of claim 1, or a pharmaceutically acceptable salt thereof.

### Claim 41 (depends on 1)

A method for enhancing an immune response in a subject in need thereof, wherein the method comprises administering to said subject an effective amount of the compound of claim 1, or a pharmaceutically acceptable salt thereof.

### Claim 42

(canceled)

### Claim 43 (depends on 1)

A method for treating a HPK1-dependent disorder, said method comprising administering to a subject in need thereof an effective amount of the compound of claim 1, or a pharmaceutically acceptable salt thereof.

### Claim 44 (depends on 43)

The method of claim 43, wherein said HPK1-dependent disorder is a cancer.

### Claim 45

(canceled)

### Claim 46

(canceled)

### Claim 47

(canceled)

### Claim 48

(canceled)

### Claim 49

(canceled)