US 2020/0048261 A1 · PYRROLO[1,2-b]PYRIDAZINE DERIVATIVES

Abstract

A compound of Formula (I): pharmaceutically acceptable salts thereof, deuterated analogs thereof, compositions thereof, and methods of treating disease using a compound thereof are disclosed.

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Claims36

Dependent claims

A compound of formula (I)

wherein “Het” is selected from:
X and Y are each independently selected from:
—H, —F, —Cl, —Br, —CN, —CF3, —CF2H, —OH, or —OCH3;
R1 and R2 are each independently selected from:
a) C1-10 alkyl optionally substituted with Z1;
b) C3-10 cycloalkyl optionally substituted with Z1;
c) 5-10 membered heteroaryl optionally substituted with Z1;
d) C6-10 aryl optionally substituted with Z1;
e) 4-12 membered heterocyclyl optionally substituted with Z1;
f) —N(R12)(R12), —S(O)2R12, —S(O)2N(R12)(R12), or —H;
Z1 is independently oxo, halo, —NO2, —N3, —CN, C1-9 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-15 cycloalkyl, C1-8 haloalkyl, aryl, heteroaryl, heterocyclyl, —O—R12, —C(O)—R12, —C(O)O—R12, —C(O)—N(R12)(R12), —N(R12)(R12), —N(R12)2(R12)+, —N(R12)C(O)—R12, —N(R12)C(O)O—R12, —N(R12)C(O)N(R12)(R12), —N(R12)S(O)2(R12), —NR12S(O)2N(R12)(R12), —NR12S(O)2O(R12), —OC(O)R12, —OC(O)OR12, —OC(O)—N(R12)(R12), —Si(R12)3, —S—R12, —S(O)R12, —S(O)(NH)R12, —S(O)2R12 or —S(O)2N(R12)(R12);
wherein any alkyl, alkenyl, alkynyl, cycloalkyl, haloalkyl, aryl, heteroaryl or heterocyclyl is optionally substituted with Z1a;
each Z1a is independently oxo, halo, —NO2, —CN, —N3, C1-9 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-15 cycloalkyl, C1-8 haloalkyl, aryl, heteroaryl, heterocyclyl, —O—R12, —C(O)R12, —C(O)O—R12, —C(O)N(R12)(R12), —N(R12)(R12), —N(R12)2(R12)+, —N(R12)—C(O)R12, —N(R12)C(O)O(R12), —N(R12)C(O)N(R12)(R12), —N(R12)S(O)2(R12), —N(R12)S(O)2—N(R12)(R12), —N(R12)S(O)2O(R12), —OC(O)R12, —OC(O)OR12, —OC(O)—N(R12)(R12), —Si(R12)3, —S—R12, —S(O)R12, —S(O)(NH)R12, —S(O)2R12 or —S(O)2N(R12)(R12);
wherein any alkyl, alkenyl, alkynyl, cycloalkyl, haloalkyl, aryl, heteroaryl or heterocyclyl is optionally substituted with Z1b;
each R12 is independently H, C1-9 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-15 cycloalkyl, aryl, heteroaryl or heterocyclyl;
wherein any alkyl, alkenyl, alkynyl, cycloalkyl, aryl, heteroaryl or heterocyclyl is optionally substituted with Z1a;
each Z1b is independently oxo, hydroxy, halo, —NO2, —N3, —CN, C1-9 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-15 cycloalkyl, C1-8 haloalkyl, aryl, heteroaryl, heterocyclyl, —O(C1-9 alkyl), —O(C2-6 alkenyl), —O(C2-6 alkynyl), —O(C3-15 cycloalkyl), —O(C1-8 haloalkyl), —O(aryl), —O(heteroaryl), —O(heterocyclyl), —NH2, —NH(C1-9 alkyl), —NH(C2-6 alkenyl), —NH(C2-6 alkynyl), —NH(C3-15 cycloalkyl), —NH(C1-8 haloalkyl), —NH(aryl), —NH(heteroaryl), —NH(heterocyclyl), —N(C1-9 alkyl)2, —N(C3-15 cycloalkyl)2, —N(C2-6 alkenyl)2, —N(C2-6 alkynyl)2, —N(C3-15 cycloalkyl)2, —N(C1-8 haloalkyl)2, —N(aryl)2, —N(heteroaryl)2, —N(heterocyclyl)2, —N(C1-9 alkyl)(C3-15 cycloalkyl), —N(C1-9 alkyl)(C2-6 alkenyl), —N(C1-9 alkyl)(C2-6 alkynyl), —N(C1-9 alkyl)(C3-15 cycloalkyl), —N(C1-9 alkyl)(C1-8 haloalkyl), —N(C1-9 alkyl)(aryl), —N(C1-9 alkyl)(heteroaryl), —N(C1-9 alkyl)(heterocyclyl), —C(O)(C1-9 alkyl), —C(O)(C2-6 alkenyl), —C(O)(C2-6 alkynyl), —C(O)(C3-15 cycloalkyl), —C(O)(C1-8 haloalkyl), —C(O)(aryl), —C(O)(heteroaryl), —C(O)(heterocyclyl), —C(O)O(C1-9 alkyl), —C(O)O(C2-6 alkenyl), —C(O)O(C2-6 alkynyl), —C(O)O(C3-15 cycloalkyl), —C(O)O(C1-8 haloalkyl), —C(O)O(aryl), —C(O)O(heteroaryl), —C(O)O(heterocyclyl), —C(O)NH2, —C(O)NH(C1-9 alkyl), —C(O)NH(C2-6 alkenyl), —C(O)NH(C2-6 alkynyl), —C(O)NH(C3-15 cycloalkyl), —C(O)NH(C1-8 haloalkyl), —C(O)NH(aryl), —C(O)NH(heteroaryl), —C(O)NH(heterocyclyl), —C(O)N(C1-9 alkyl)2, —C(O)N(C3-15 cycloalkyl)2, —C(O)N(C2-6 alkenyl)2, —C(O)N(C2-6 alkynyl)2, —C(O)N(C3-15 cycloalkyl)2, —C(O)N(C1-8 haloalkyl)2, —C(O)N(aryl)2, —C(O)N(heteroaryl)2, —C(O)N(heterocyclyl)2, —NHC(O)(C1-9 alkyl), —NHC(O)(C2-6 alkenyl), —NHC(O)(C2-6 alkynyl), —NHC(O)(C3-15 cycloalkyl), —NHC(O)(C1-8 haloalkyl), —NHC(O)(aryl), —NHC(O)(heteroaryl), —NHC(O)(heterocyclyl), —NHC(O)O(C1-9 alkyl), —NHC(O)O(C2-6 alkenyl), —NHC(O)O(C2-6 alkynyl), —NHC(O)O(C3-15 cycloalkyl), —NHC(O)O(C1-8 haloalkyl), —NHC(O)O(aryl), —NHC(O)O(heteroaryl), —NHC(O)O(heterocyclyl), —NHC(O)NH(C1-9 alkyl), —NHC(O)NH(C2-6 alkenyl), —NHC(O)NH(C2-6 alkynyl), —NHC(O)NH(C3-15 cycloalkyl), —NHC(O)NH(C1-8 haloalkyl), —NHC(O)NH(aryl), —NHC(O)NH(heteroaryl), —NHC(O)NH(heterocyclyl), —SH, —S(C1-9 alkyl), —S(C2-6 alkenyl), —S(C2-6 alkynyl), —S(C3-15 cycloalkyl), —S(C1-8 haloalkyl), —S(aryl), —S(heteroaryl), —S(heterocyclyl), —NHS(O)(C1-9 alkyl), —N(C1-9 alkyl)(S(O)(C1-9 alkyl), —S(O)N(C1-9 alkyl)2, —S(O)(C1-9 alkyl), —S(O)(NH)(C1-9 alkyl), —S(O)(C2-6 alkenyl), —S(O)(C2-6 alkynyl), —S(O)(C3-15 cycloalkyl), —S(O)(C1-8 haloalkyl), —S(O)(aryl), —S(O)(heteroaryl), —S(O)(heterocyclyl), —S(O)2(C1-9 alkyl), —S(O)2(C2-6 alkenyl), —S(O)2(C2-6 alkynyl), —S(O)2(C3-15 cycloalkyl), —S(O)2(C1-8 haloalkyl), —S(O)2(aryl), —S(O)2(heteroaryl), —S(O)2(heterocyclyl), —S(O)2NH(C1-9 alkyl), or —S(O)2N(C1-9 alkyl)2;
wherein any alkyl, cycloalkyl, aryl, heteroaryl, or heterocyclyl is optionally substituted with one or more halo, C1-9 alkyl, C1-8 haloalkyl, —OH, —NH2, —NH(C1-9 alkyl), —NH(C3-15 cycloalkyl), —NH(C1-8 haloalkyl), —NH(aryl), —NH(heteroaryl), —NH(heterocyclyl), —N(C1-9 alkyl)2, —N(C3-15 cycloalkyl)2, —NHC(O)(C3-15 cycloalkyl), —NHC(O)(C1-8 haloalkyl), —NHC(O)(aryl), —NHC(O)(heteroaryl), —NHC(O)(heterocyclyl), —NHC(O)O(C1-9 alkyl), —NHC(O)O(C2-6 alkynyl), —NHC(O)O(C3-15 cycloalkyl), —NHC(O)O(C1-8 haloalkyl), —NHC(O)O(aryl), —NHC(O)O(heteroaryl), —NHC(O)O(heterocyclyl), —NHC(O)NH(C1-9 alkyl), —S(O)(NH)(C1-9 alkyl), S(O)2(C1-9 alkyl), —S(O)2(C3-15 cycloalkyl), —S(O)2(C1-8 haloalkyl), —S(O)2(aryl), —S(O)2(heteroaryl), —S(O)2(heterocyclyl), —S(O)2NH(C1-9 alkyl), —S(O)2N(C1-9 alkyl)2, —O(C3-15 cycloalkyl), —O(C1-8 haloalkyl), —O(aryl), —O(heteroaryl), —O(heterocyclyl), or —O(C1-9 alkyl);
or a pharmaceutically acceptable salt, stereoisomer, mixture of stereoisomers, or deuterated analog thereof.

16 more elements

A compound of formula (Ia)

wherein R1 and R2 are each independently selected from:
a) C1-10 alkyl optionally substituted with Z1;
b) C3-10 cycloalkyl optionally substituted with Z1;
c) 5-10 membered heteroaryl optionally substituted with Z1;
d) C6-10 aryl optionally substituted with Z1;
e) 4-12 membered heterocyclyl optionally substituted with Z1;
and
f) —N(R12)(R12), —S(O)2R12, —S(O)2N(R12)(R12), or —H;
Z1 is independently oxo, halo, —NO2, —N3, —CN, C1-9 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-15 cycloalkyl, C1-8 haloalkyl, aryl, heteroaryl, heterocyclyl, —O—R12, —C(O)—R12, —C(O)O—R12, —C(O)—N(R12)(R12), —N(R12)(R12), —N(R12)2(R12)+, —N(R12)C(O)—R12, —N(R12)C(O)O—R12, —N(R12)C(O)N(R12)(R12), —N(R12)S(O)2(R12), —NR12S(O)2N(R12)(R12), —NR12S(O)2O(R12), —OC(O)R12, —OC(O)OR12, —OC(O)—N(R12)(R12), —Si(R12)3, —S—R12, —S(O)R12, —S(O)(NH)R12, —S(O)2R12 or —S(O)2N(R12)(R12);
wherein any alkyl, alkenyl, alkynyl, cycloalkyl, haloalkyl, aryl, heteroaryl or heterocyclyl is optionally substituted with Z1a;
each Z1a is independently oxo, halo, —NO2, —CN, —N3, C1-9 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-15 cycloalkyl, C1-8 haloalkyl, aryl, heteroaryl, heterocyclyl, —O—R12, —C(O)R12, —C(O)O—R12, —C(O)N(R12)(R12), —N(R12)(R12), —N(R12)2(R12)+, —N(R12)—C(O)R12, —N(R12)C(O)O(R12), —N(R12)C(O)N(R12)(R12), —N(R12)S(O)2(R12), —N(R12)S(O)2—N(R12)(R12), —N(R12)S(O)2O(R12), —OC(O)R12, —OC(O)OR12, —OC(O)—N(R12)(R12), —Si(R12)3, —S—R12, —S(O)R12, —S(O)(NH)R12, —S(O)2R12 or —S(O)2N(R12)(R12);
wherein any alkyl, alkenyl, alkynyl, cycloalkyl, haloalkyl, aryl, heteroaryl or heterocyclyl is optionally substituted with Z1b;
each R12 is independently H, C1-9 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-15 cycloalkyl, aryl, heteroaryl or heterocyclyl;
wherein any alkyl, alkenyl, alkynyl, cycloalkyl, aryl, heteroaryl or heterocyclyl is optionally substituted with Z1a;
each Z1b is independently oxo, hydroxy, halo, —NO2, —N3, —CN, C1-9 alkyl, C2-6 alkenyl, C2-6 alkynyl, C3-15 cycloalkyl, C1-8 haloalkyl, aryl, heteroaryl, heterocyclyl, —O(C1-9 alkyl), —O(C2-6 alkenyl), —O(C2-6 alkynyl), —O(C3-15 cycloalkyl), —O(C1-8 haloalkyl), —O(aryl), —O(heteroaryl), —O(heterocyclyl), —NH2, —NH(C1-9 alkyl), —NH(C2-6 alkenyl), —NH(C2-6 alkynyl), —NH(C3-15 cycloalkyl), —NH(C1-8 haloalkyl), —NH(aryl), —NH(heteroaryl), —NH(heterocyclyl), —N(C1-9 alkyl)2, —N(C3-15 cycloalkyl)2, —N(C2-6 alkenyl)2, —N(C2-6 alkynyl)2, —N(C3-15 cycloalkyl)2, —N(C1-8 haloalkyl)2, —N(aryl)2, —N(heteroaryl)2, —N(heterocyclyl)2, —N(C1-9 alkyl)(C3-15 cycloalkyl), —N(C1-9 alkyl)(C2-6 alkenyl), —N(C1-9 alkyl)(C2-6 alkynyl), —N(C1-9 alkyl)(C3-15 cycloalkyl), —N(C1-9 alkyl)(C1-8 haloalkyl), —N(C1-9 alkyl)(aryl), —N(C1-9 alkyl)(heteroaryl), —N(C1-9 alkyl)(heterocyclyl), —C(O)(C1-9 alkyl), —C(O)(C2-6 alkenyl), —C(O)(C2-6 alkynyl), —C(O)(C3-15 cycloalkyl), —C(O)(C1-8 haloalkyl), —C(O)(aryl), —C(O)(heteroaryl), —C(O)(heterocyclyl), —C(O)O(C1-9 alkyl), —C(O)O(C2-6 alkenyl), —C(O)O(C2-6 alkynyl), —C(O)O(C3-15 cycloalkyl), —C(O)O(C1-8 haloalkyl), —C(O)O(aryl), —C(O)O(heteroaryl), —C(O)O(heterocyclyl), —C(O)NH2, —C(O)NH(C1-9 alkyl), —C(O)NH(C2-6 alkenyl), —C(O)NH(C2-6 alkynyl), —C(O)NH(C3-15 cycloalkyl), —C(O)NH(C1-8 haloalkyl), —C(O)NH(aryl), —C(O)NH(heteroaryl), —C(O)NH(heterocyclyl), —C(O)N(C1-9 alkyl)2, —C(O)N(C3-15 cycloalkyl)2, —C(O)N(C2-6 alkenyl)2, —C(O)N(C2-6 alkynyl)2, —C(O)N(C3-15 cycloalkyl)2, —C(O)N(C1-8 haloalkyl)2, —C(O)N(aryl)2, —C(O)N(heteroaryl)2, —C(O)N(heterocyclyl)2, —NHC(O)(C1-9 alkyl), —NHC(O)(C2-6 alkenyl), —NHC(O)(C2-6 alkynyl), —NHC(O)(C3-15 cycloalkyl), —NHC(O)(C1-8 haloalkyl), —NHC(O)(aryl), —NHC(O)(heteroaryl), —NHC(O)(heterocyclyl), —NHC(O)O(C1-9 alkyl), —NHC(O)O(C2-6 alkenyl), —NHC(O)O(C2-6 alkynyl), —NHC(O)O(C3-15 cycloalkyl), —NHC(O)O(C1-8 haloalkyl), —NHC(O)O(aryl), —NHC(O)O(heteroaryl), —NHC(O)O(heterocyclyl), —NHC(O)NH(C1-9 alkyl), —NHC(O)NH(C2-6 alkenyl), —NHC(O)NH(C2-6 alkynyl), —NHC(O)NH(C3-15 cycloalkyl), —NHC(O)NH(C1-8 haloalkyl), —NHC(O)NH(aryl), —NHC(O)NH(heteroaryl), —NHC(O)NH(heterocyclyl), —SH, —S(C1-9 alkyl), —S(C2-6 alkenyl), —S(C2-6 alkynyl), —S(C3-15 cycloalkyl), —S(C1-8 haloalkyl), —S(aryl), —S(heteroaryl), —S(heterocyclyl), —NHS(O)(C1-9 alkyl), —N(C1-9 alkyl)(S(O)(C1-9 alkyl), —S(O)N(C1-9 alkyl)2, —S(O)(C1-9 alkyl), —S(O)(NH)(C1-9 alkyl), —S(O)(C2-6 alkenyl), —S(O)(C2-6 alkynyl), —S(O)(C3-15 cycloalkyl), —S(O)(C1-8 haloalkyl), —S(O)(aryl), —S(O)(heteroaryl), —S(O)(heterocyclyl), —S(O)2(C1-9 alkyl), —S(O)2(C2-6 alkenyl), —S(O)2(C2-6 alkynyl), —S(O)2(C3-15 cycloalkyl), —S(O)2(C1-8 haloalkyl), —S(O)2(aryl), —S(O)2(heteroaryl), —S(O)2(heterocyclyl), —S(O)2NH(C1-9 alkyl), or —S(O)2N(C1-9 alkyl)2;
wherein any alkyl, cycloalkyl, aryl, heteroaryl, or heterocyclyl is optionally substituted with one or more halo, C1-9 alkyl, C1-8 haloalkyl, —OH, —NH2, —NH(C1-9 alkyl), —NH(C3-15 cycloalkyl), —NH(C1-8 haloalkyl), —NH(aryl), —NH(heteroaryl), —NH(heterocyclyl), —N(C1-9 alkyl)2, —N(C3-15 cycloalkyl)2, —NHC(O)(C3-15 cycloalkyl), —NHC(O)(C1-8 haloalkyl), —NHC(O)(aryl), —NHC(O)(heteroaryl), —NHC(O)(heterocyclyl), —NHC(O)O(C1-9 alkyl), —NHC(O)O(C2-6 alkynyl), —NHC(O)O(C3-15 cycloalkyl), —NHC(O)O(C1-8 haloalkyl), —NHC(O)O(aryl), —NHC(O)O(heteroaryl), —NHC(O)O(heterocyclyl), —NHC(O)NH(C1-9 alkyl), —S(O)(NH)(C1-9 alkyl), S(O)2(C1-9 alkyl), —S(O)2(C3-15 cycloalkyl), —S(O)2(C1-8 haloalkyl), —S(O)2(aryl), —S(O)2(heteroaryl), —S(O)2(heterocyclyl), —S(O)2NH(C1-9 alkyl), —S(O)2N(C1-9 alkyl)2, —O(C3-15 cycloalkyl), —O(C1-8 haloalkyl), —O(aryl), —O(heteroaryl), —O(heterocyclyl), or —O(C1-9 alkyl);
or a pharmaceutically acceptable salt, stereoisomer, mixture of stereoisomers, or deuterated analog thereof.

14 more elements

Dependencies are inferred from the claim text.

Description27,196 words

Summary2,171 words

#The present disclosure relates to novel compounds that are inhibitors of the kinase IRAK4. The disclosure also relates to methods for preparing the compounds and to pharmaceutical compositions comprising such compounds.

#Interleukin-1 receptor-associated kinase-4 (IRAK4) is a serine-threonine kinase which acts as a mediator in interleukin-1/Toll-like receptor (IL-1/TLR) signaling cascades. More particularly, IRAK4 is involved in activation of adaptor protein myeloid differentiation primary response gene 88 (MyD88) signaling cascades and is hypothesized to play a role in inflammatory and fibrotic disorders, such as rheumatoid arthritis (RA), inflammatory bowel disease (IBD), gout, Lyme disease, arthritis, psoriasis, pelvic inflammatory disease, systemic lupus erythematosus (SLE), Sjogren's syndrome, viral myocarditis, acute and chronic tissue injury, non-alcoholic steatohepatitis (NASH), alcoholic hepatitis and kidney disease, including chronic kidney disease and diabetic kidney disease. In addition, IRAK4 plays a role in certain cancers and is hypothesized to play a role in inflammation associated with gastrointestinal infections, including C. difficile. Signaling through IL-1R/TLR results in the activation of MyD88 which recruits IRAK4 and IRAK1 to form a signaling complex. This complex then interacts with a series of kinases, adaptor proteins, and ligases, ultimately resulting in the activation of nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB), activator protein-1 (AP1), cyclic AMP-responsive element-binding protein (CREB) and the interferon-regulatory factors (IRFs), including IRF5 and IRF7, inducing the generation of pro-inflammatory cytokines and type I interferons.

#Therefore, inhibitors of IRAK4 may be useful in the treatment of inflammatory and fibrotic disorders, such as rheumatoid arthritis (RA), inflammatory bowel disease (IBD), gout, Lyme disease, arthritis, psoriasis, pelvic inflammatory disease, systemic lupus erythematosus (SLE), Sjogren's syndrome, inflammation associated with gastrointestinal infections, including C. difficile, viral myocarditis, acute and chronic tissue injury, non-alcoholic steatohepatitis (NASH), alcoholic hepatitis and kidney disease, including chronic kidney disease and diabetic kidney disease. (Joosten, L. A. B et al., TOLL-LIKE RECEPTORS AND CHRONIC INFLAMMATION IN RHEUMATIC DISEASES: NEW DEVELOPMENTS, Nat. Rev. Rheumatol., 346 |Jun. 2016 12; 344-357 Published online 12 May 2016) (Valaperti, A. et al., INNATE IMMUNE INTERLEUKIN-1RECEPTOR-ASSOCIATED KINASE 4 EXACERBATES VIRAL MYOCARDITIS BY REDUCING CCR5+CD11b+ MONOCYTE MIGRATION AND IMPAIRING INTERFERON PRODUCTION, Circulation, 128 | Sep. 2013 14; 1542-1554), as well as Type I interferonopathies, such as Aicardi-Goutières syndrome, Familial chilblain lupus, and Retinal vasculopathy with cerebral leukodystrophy, (Lee-Kirsch et al., TYPE I INTERFERONOPATHIES—AN EXPANDING DISEASE SPECTRUM OF IMMUNODYSREGULATION, Semin. Immunopathol. (2015) 37:349-357), (Leaf, I. A. et al., PERICYTE MYD88 AND IRAK4 CONTROL INFLAMMATORY AND FIBROTIC RESPONSES TO TISSUE INJURY, The Journal of Clinical Investigation, 127 | Jan. 2017 1; 321-334), (Seki, E. et al., TLR4 ENHANCES TGF-β SIGNALING AND HEPATIC FIBROSIS, Nature Medicine, 13 | Nov. 2007 11; 1324-1332), (Garcia-Martinez, I. et al., HEPATOCYTE MITOCHONDRIAL DNA DRIVES NONALCHOLIC STEATOHEPATITIS BY ACTIVATION OF TLR9, The Journal of Clinical Investigation, 126 | Mar. 2016 3; 859-864).

Detailed description25,025 words

#The following description sets forth exemplary methods, parameters and the like. It should be recognized, however, that such description is not intended as a limitation on the scope of the present disclosure but is instead provided as a description of exemplary embodiments.

#A dash (“-”) that is not between two letters or symbols is used to indicate a point of attachment for a substituent. For example, —C(O)NH2 is attached through the carbon atom. A dash at the front or end of a chemical group is a matter of convenience; chemical groups may be depicted with or without one or more dashes without losing their ordinary meaning. A wavy line drawn through a line in a structure indicates a point of attachment of a group. Unless chemically or structurally required, no directionality is indicated or implied by the order in which a chemical group is written or named.

#The prefix “Cu-v” indicates that the following group has from u to v carbon atoms. For example, “C1-6 alkyl” indicates that the alkyl group has from 1 to 6 carbon atoms.

PYRROLO[1,2-b]PYRIDAZINE DERIVATIVES

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PYRROLO[1,2-b]PYRIDAZINE DERIVATIVES

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Abstract

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Claims36

Description27,196 words

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Description27,196 words