Patent number: 9399073
Abstract: A compound with the formula (I), wherein: R2 is of formula (II), where X is selected from the group comprising: OH, SH, CO2H, COH, N?C?O, NHNH2, CONHNH2, formula (A), formula (B), NHRN, wherein RN is selected from the group comprising H and C1-4 alkyl; RC1, RC2 and RC3 are independently selected from H and unsubstituted C1-2 alkyl; and either: R12 is selected from the group consisting of: (ia) C5-10 aryl group, optionally substituted by one or more substituents selected from the group comprising: halo, nitro, cyano, ether, C1-7 alkyl, C3-7 heterocyclyl and bis-oxy-C1-3 alkylene; (ib) C1-5 saturated aliphatic alkyl; (ic) C3-6 saturated cycloalkyl; (id) formula (C), wherein each of R21, R22 and R23 are independently selected from H, C1-3 saturated alkyl, C2-3 alkenyl, C2-3 alkynyl and cyclopropyl, where the total number of carbon atoms in the R12 group is no more than 5; (ie) formula (D), wherein one of R25a and R25b is H and the other is selected from: phenyl, which phenyl is optionally substituted by a group
Type:
Grant
Filed:
October 12, 2012
Date of Patent:
July 26, 2016
Assignees:
SEATTLE GENETICS, INC., MEDIMMUNE LIMITED
Inventors:
Philip Wilson Howard, Arnaud Tiberghien, Scott Jeffrey, Patrick Burke