A series of isoquinoline-1,3,4-trione derivatives were identified as novel and potent inhibitors of caspase-3 through structural modification of the original compound from high-throughput screening. Various analogues (2, 6, 9, 13, and 14) were synthesized and identified as caspase inhibitors, and the introduction of a 6-N-acyl group (compound 13) greatly improved their activity. Some of them showed low nanomolar potency against caspase-3 in vitro (for example, for 6k, IC50 = 40 nM) and significant protection against apoptosis in a model cell system. Additionally, compound Of demonstrated a dose-dependent decrease in infarct volume in the transient MCA occlusion stroke model. The present small-molecule caspase-3 inhibitor with novel structures different from structures of known caspase inhibitors revealed a new direction for therapeutic strategies directed against diseases involving abnormally up-regulated apoptosis.
US7683073B2
申请人:——
公开号:US7683073B2
公开(公告)日:2010-03-23
Iodine-catalyzed oxidative multiple C–H bond functionalization of isoquinolines with methylarenes: an efficient synthesis of isoquinoline-1,3,4(2H)-triones
作者:Di Zhu、Wen-Kun Luo、Luo Yang、Da-You Ma
DOI:10.1039/c7ob01539a
日期:——
An iodine-catalyzed multiple C-H bonds functionalization of isoquinolines with methylarenes via successively benzylic sp3 C-H iodination/N-benzylation/amidation/double sp2 C-H oxidation sequence is developed. This reaction utilizes un-functionalized isoquinolines and readily available methylarenes as starting materials, proceeds under metal-free conditions, and avoids muti-step experimental operation