Improved efficiency and selectivity in peptide synthesis: Use of triethylsilane as a carbocation scavenger in deprotection of t-butyl esters and t-butoxycarbonyl-protected sites
作者:Anita Mehta、Rabih Jaouhari、Timothy J. Benson、Kenneth T. Douglas
DOI:10.1016/s0040-4039(00)79116-7
日期:1992.9
triethylsilane as a carbocation scavenger in the presence of trifluoroacetic acid in dichloromethane leads to increased yields, decreased reaction times, simple work-up and improved selectivity for the deprotection of t-butyl ester and t-butoxycarbonyl sites in protected amino-acids and peptides in the presence of otheracid-sensitiveprotectinggroups such as the benzyloxycarbonyl, 9-fluorenylmethoxycarbonyl
Design and synthesis of orally active pyrrolidin-2-one-based factor Xa inhibitors
作者:Nigel S. Watson、David Brown、Matthew Campbell、Chuen Chan、Laiq Chaudry、Máire A. Convery、Rebecca Fenwick、J. Nicole Hamblin、Claudine Haslam、Henry A. Kelly、N. Paul King、Cynthia L. Kurtis、Andrew R. Leach、Gary R. Manchee、Andrew M. Mason、Charlotte Mitchell、Champa Patel、Vipulkumar K. Patel、Stefan Senger、Gita P. Shah、Helen E. Weston、Caroline Whitworth、Robert J. Young
DOI:10.1016/j.bmcl.2006.04.053
日期:2006.7
A series of novel, non-basic 3-(6-chloronaphth-2-ylsulfonyl)aminopyrrolidin-2-one-based factor Xa (fXa) inhibitors, incorporating an alanylamide P4 group, was designed and synthesised. Within this series, the N-2-(morpholin-4-yl)-2-oxoethyl derivative 24 was shown to be a potent, selective fXa inhibitor with good anticoagulant activity. Moreover, 24 possessed highly encouraging rat and dog pharmacokinetic profiles with excellent oral bioavailabilities in both species. (c) 2006 Elsevier Ltd. All rights reserved.