开发了一种温和的Rh催化方法,通过还原1-芳基吲唑酮和2-芳基-[4 + 2]环合反应,合成羟基亚氨基官能化的吲唑并[1,2- a ] cinnolines和邻苯并[2,3- a ] cinnolines。 2,3-二氢酞嗪-1,4-二酮与各种硝基烯烃。在无还原剂的条件下,通过连续的C–H活化/烯烃插入/还原反应,合成了目标肟肟修饰的四环稠合肉桂醛。
The synthesis and biologic evaluation of anti-platelet and cytotoxic β-nitrostyrenes
摘要:
Our previous studies demonstrated that two cytotoxic beta-nitrostyrene derivatives, 3,4-methylenedioxy-beta-nitrostyrene (MNS) and 4-O-benzoyl-3-methoxy-beta-nitrostyrene (BMNS) exhibit potent anti-platelet activities. In this study, a series of beta-nitrostyrenes were synthesized and subjected to anti-platelet aggregation assay and cytotoxicity assay. The mono-and di-substitutions on the B ring of BMNS tended to increase the anti-platelet activity and decrease the cytotoxic activity. Of these, compounds 19 and 24 exhibited the most potent inhibitory effects on thrombin-and collagen-induced platelet aggregation (IC(50) <= 0.7 mu M) without significant cytotoxicity on a human cancer cell line (up to 20 mu M). Further studies indicated that compounds 19 and 24 inhibited platelet aggregation via prevention of glycoprotein IIb/IIIa activation. The potent and novel effects of BMNS derivatives make them attractive candidates for the development of new anti-platelet agents. (C) 2010 Elsevier Ltd. All rights reserved.