Herein, we report the development of a tailored cobalt catalyst system of Cp*Co(III)(LX) toward intramolecular C-H nitrene insertion of azidoformates to afford cyclic carbamates. The cobalt complexes were easy to prepare and bench-stable, thus offering a convenient reaction protocol. The catalytic reactivity was significantly improved by the electronic tuning of the bidentate LX ligands, and the observed
A series of 1-alkoxycarbonyl-3-halogenoazetidin-2-ones, designed as potential suicide inhibitors of serine proteases, has been synthesized and evaluated against porcine pancreatic elastase (PPE). All the compounds were transient inhibitors, their activity depending mainly on the nature of the halogen substituent: bromo- and iodo-derivatives are more active (K-i similar to2-22 muM) than 3-chloroazetidinones (K-i similar to20-150 muM). The lipophilicity of the N-1 substituent appeared to exert a slightly positive effect. (C) 2002 Elsevier Science Ltd. All rights reserved.
Design and synthesis of highly potent fumagillin analogues from homology modeling for a human MetAP-2
作者:Cheol Kyu Han、Soon Kil Ahn、Nam Song Choi、Ryung Kee Hong、Seung Kee Moon、Hyoung Sik Chun、Sang Joon Lee、Jung Woo Kim、Chung Il Hong、Deukjoon Kim、Jeong Hyeok Yoon、Kyoung Tai No
DOI:10.1016/s0960-894x(99)00577-6
日期:2000.1
New fumagillin analogues were designed through structure-based molecular modeling with a human methionine aminopeptidase-2. Among the fumagillin analogues, cinnamic acid eater derivative CKD-731 showed 1000-fold more potent proliferation inhibitory activity on endothelial cell than TNP-470. (C) 1999 Elsevier Science Ltd. All rights reserved.