US 11,952,376 B2
Substituted amino acids as integrin inhibitors
Jacob Cha, San Bruno, CA (US); Manuel Muñoz, Vallejo, CA (US); Maureen Reilly, Burlingame, CA (US); Nicole Cooper, Oakland, CA (US); Katerina Leftheris, San Mateo, CA (US); David J. Morgans, Jr., South San Francisco, CA (US); Timothy Hom, Sunnyvale, CA (US); Yajun Zheng, Foster City, CA (US); Christopher Bailey, Mountain View, CA (US); and Darren Finkelstein, Hillsborough, CA (US)
Assigned to PLIANT THERAPEUTICS, INC., South San Francisco, CA (US)
Filed by Pliant Therapeutics, Inc., South San Francisco, CA (US)
Filed on Oct. 18, 2021, as Appl. No. 17/504,384.
Application 17/504,384 is a continuation of application No. 16/596,649, filed on Oct. 8, 2019, granted, now 11,180,494.
Claims priority of provisional application 62/742,901, filed on Oct. 8, 2018.
Prior Publication US 2022/0144829 A1, May 12, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. A61K 31/519 (2006.01); C07D 471/04 (2006.01); C07D 487/04 (2006.01); C07D 519/00 (2006.01)
CPC C07D 471/04 (2013.01) [C07D 519/00 (2013.01)] 172 Claims
 
1. A compound of formula (I):

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or a pharmaceutically acceptable salt, stereoisomer, or tautomer thereof,
wherein:
G is —C(O)R2 or R3;
L1 is C2-C4 alkylene, wherein the C2-C4 alkylene is optionally substituted by 1 or more independently selected R4 substituents;
L2 is a bond or C1-C3 alkylene, wherein the C1-C3 alkylene is optionally substituted by 1 or more independently selected R4 substituents;
L3 is C2-C4 alkylene, wherein the C2-C4 alkylene is optionally substituted by 1 or more independently selected R4 substituents;
Y is a bond or C3-C5 cycloalkylene, wherein the C3-C5 cycloalkylene is optionally substituted by 1 or more independently selected Ya substituents;
each Ya is independently ═O or R4;
R1 is:

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wherein the 5,6,7,8-tetrahydro-1,8-naphthyridin-2-yl or the 1,2,3,4-tetrahydro-1,8-naphthyridin-2-yl is optionally substituted by 1 or more independently selected R4 substituents;
R2 is C1-C6 alkyl, NR2gR2h, OR21, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl
wherein the C1-C6 alkyl is optionally substituted by 1 or more independently selected R2a substituents;
wherein the C3-C8 cycloalkyl is optionally substituted by 1 or more independently selected R2b substituents;
wherein the 3- to 12-membered heterocyclyl is optionally substituted by 1 or more independently selected R2c substituents;
wherein the C6-C14 aryl is optionally substituted by 1 or more independently selected R2d substituents; and
wherein the 5- to 10-membered heteroaryl is optionally substituted by 1 or more independently selected R2e substituents;
each R2a is independently ═O or R4;
each R2b is independently ═O or R4;
each R2c is independently ═O or R4;
each R2d is independently ═O or R4;
each R2e is independently ═O or R4;
R2f is C1-C6 alkyl, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl, wherein the C1-C6 alkyl, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl is optionally substituted by 1 or more independently selected R2i substituents;
R2g is H, D, C1-C6 alkyl, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl, wherein the C1-C6 alkyl, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl is optionally substituted by 1 or more independently selected R2j substituents;
R2h is H, D, C1-C6 alkyl, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl, wherein the C1-C6 alkyl, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl is optionally substituted by 1 or more independently selected R2j substituents;
each R2i is independently ═O or R4;
each R2j is independently ═O or R4;
R3 is C1-C6 alkyl, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl;
wherein the C1-C6 alkyl is optionally substituted by 1 or more independently selected R3a substituents;
wherein the C3-C8 cycloalkyl is optionally substituted by 1 or more independently selected R3b substituents;
wherein the 3- to 12-membered heterocyclyl is optionally substituted by 1 or more independently selected R3c substituents;
wherein the C6-C14 aryl is optionally substituted by 1 or more independently selected R3d substituents; and
wherein the 5- to 10-membered heteroaryl is optionally substituted by 1 or more independently selected R3e substituents;
each R3a is independently ═O or R4;
each R3b is independently ═O or R4;
each R3c is independently ═O or R4;
each R3d is independently ═O or R4;
each R3e is independently ═O or R4;
each R4 is independently D, halogen, CN, NO2, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C(NH)OR5, C(O)R5, C(O)NR6R7, C(O)OR5, P(O)(OR5)(OR6), NR6R7, NR5C(O)R6, NR5C(O)NR6R7, NR5C(O)OR6, NR5S(O)R6, NR5S(O)2R6, OR5, OC(O)R5, SR5S(O)R5, S(O)NR6R7, S(O)2R5, S(O)2NR6R7, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl, wherein each C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl is optionally and independently substituted by 1 or more independently selected R4a substituents;
each R4a is independently D, halogen, CN, C1-C6 alkyl, C(O)R8, C(O)OR8, P(O)(OR8)(OR9), NR8R9, NR8C(O)OR10, OR8, ═O, —S(O)R8, S(O)2R8, C3-C8 cycloalkyl, 3- to 12-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl, wherein each C1-C6 alky, 3- to 12-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl is optionally and independently substituted by 1 or more independently selected R4b substituents;
each R4b is independently D, halogen, C1-C6 alkyl, OH, OD, or ═O, wherein each C1-C6 alkyl is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, OH, OD, and ═O;
each R5 is independently H, D, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C6 cycloalkyl, 3- to 10-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl wherein each C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C6 cycloalkyl, 3- to 10-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl is optionally and independently substituted by 1 or more independently selected R5a substituents;
each R5a is independently D, halogen, CN, C1-C6 alkyl, P(O)(OR11)(OR12), NR11R12, OR10, ═O, or 3- to 12-membered heterocyclyl, wherein each C1-C6 alkyl is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, OH, OD, and ═O;
each R6 is independently H, D, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C6 cycloalkyl, 3- to 6-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl,
wherein each C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C6 cycloalkyl, 3- to 6-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, CN, C1-C6 alkyl, NR11R12, OR10, and ═O; and
wherein each C1-C6 alkyl substituent is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, OH, OD, and ═O;
each R7 is independently H, D, C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C6 cycloalkyl, 3- to 6-membered heterocyclyl, C6-C14 aryl, or 5- to 10-membered heteroaryl,
wherein each C1-C6 alkyl, C2-C6 alkenyl, C2-C6 alkynyl, C3-C6 cycloalkyl, 3- to 6-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, CN, C1-C6 alkyl, NR11R12, OR, and ═O; and
wherein each C1-C6 alkyl substituent is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, OH, OD, and ═O; or
R6 and R7, together with the atom to which they are attached, form a 3- to 10-membered heterocyclyl;
wherein the 3- to 10-membered heterocyclyl is optionally substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, C1-C6 alkyl, NR11R12, OR10, and ═O; and
wherein each C1-C6 alkyl substituent is optionally and independently substituted by 1 or more substituents independently selected form the group consisting of: D, halogen, OH, OD, and ═O;
each R8 is independently H, D, C1-C6 alkyl, C2-C6 alkenyl, or C2-C6 alkynyl, wherein each C1-C6alkyl, C2-C6 alkenyl, and C2-C6 alkynyl is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, and ═O:
each R9 is independently H, D, C1-C6 alkyl, C2-C6 alkenyl, or C2-C6 alkynyl, wherein each C1-C6alkyl, C2-C6 alkenyl, and C2-C6 alkynyl is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, and ═O;
each R10 is independently H, D, C1-C6 alkyl, C2-C6 alkenyl, or C2-C6 alkynyl, wherein each C1-C6alkyl, C2-C6 alkenyl, and C2-C6 alkynyl is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, and ═O;
each R11 is independently H, D, C1-C6 alkyl, C2-C6 alkenyl, or C2-C6 alkynyl, wherein each C1-C6 alkyl, C2-C6 alkenyl, and C2-C6 alkynyl is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, and ═O; and
each R12 is independently H, D, C1-C6 alkyl, C2-C6 alkenyl, or C2-C6 alkynyl, wherein each C1-C6alkyl, C2-C6 alkenyl, and C2-C6 alkynyl is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, and ═O; or
R11 and R12, together with the atom to which they are attached, form a 3- to 6-membered heterocyclyl;
wherein the 3- to 6-membered heterocyclyl is optionally substituted by 1 or more substituents independently selected from the group consisting of: D, halogen, C1-C6 alkyl, and ═O; and
wherein the C1-C6 alkyl substituent is optionally and independently substituted by 1 or more substituents independently selected from the group consisting of: D, halogen and ═O;
with the provisos that:
(i) if

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 is

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 then R2 is not tetrahydropyranyl;
wherein the tetrahydropyranyl is substituted by 1, 2, or 3 independently selected R2c′ substituents;
wherein each R2c′ is independently R4′;
wherein each R4′ is selected from the group consisting of: D, 3- to 12-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl; and
wherein each 3- to 12-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl is optionally and independently substituted by 1 or more independently selected R4a substituents;
(ii) if

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 is

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 then R2 is not phenyl;
wherein the phenyl is substituted by 1, 2, or 3 independently selected R2d′ substituents;
wherein each R2c′ is independently R4′;
wherein each R4′ is independently selected from the group consisting of: D, 3- to 12-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl; and
wherein each 3- to 12-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl is optionally and independently substituted by 1 or more independently selected R4a substituents; or
(iii) if

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 is

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 then R2 is not pyridyl;
wherein the pyridyl is substituted by 1, 2, or 3 independently selected R2e′ substituents;
wherein each R2e′ is independently R4′;
wherein each R4′ is independently selected from the group consisting of: D, 3- to 12-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl; and
wherein each 3- to 12-membered heterocyclyl, C6-C14 aryl, and 5- to 10-membered heteroaryl is optionally and independently substituted by 1 or more independently selected R4a substituents.
 
143. The compound of claim 1, wherein the compound is selected from the group consisting of:

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or a pharmaceutically acceptable salt or tautomer thereof.