Boron trifluoride-diethyl ether complex (BF3⋅OEt2) was demonstrated to be an efficient catalyst for the amino-Claisen rearrangements of various aromatic N-allylamines into the corresponding o-allylamines in moderate yields.
2-Phenyl-4-piperazinylbenzimidazoles: Orally active inhibitors of the gonadotropin releasing hormone (GnRH) receptor
作者:Jeffrey C. Pelletier、Murty Chengalvala、Josh Cottom、Irene Feingold、Lloyd Garrick、Daniel Green、Diane Hauze、Christine Huselton、James Jetter、Wenling Kao
DOI:10.1016/j.bmc.2008.05.024
日期:2008.7.1
Antagonism of the gonadotropin releasing hormone (GnRH) receptor has shown positive clinical results in numerous reproductive tissue disorders such as endometriosis, prostate cancer and others. Traditional therapy has been limited to peptide agonists and antagonists. Recently, small molecule GnRH antagonists have emerged as potentially new treatments. This article describes the discovery of 2-phenyl-4-piperazinylbenzimidazoles as small molecule GnRH antagonists with nanomolar potency in in vitro binding and functional assays, excellent bioavailability (rat % F > 70) and demonstrated oral activity in a rat model having shown significant serum leuteinizing hormone (LH) suppression. (c) 2008 Elsevier Ltd. All rights reserved.
US4512929A
申请人:——
公开号:US4512929A
公开(公告)日:1985-04-23
US4847367A
申请人:——
公开号:US4847367A
公开(公告)日:1989-07-11
A concise synthesis of a benzimidazole analogue of mycophenolic acid using a BF3-Et2O catalyzed amino-claisen rearrangement.
作者:Gaifa Lai、Wayne K. Anderson
DOI:10.1016/s0040-4039(00)91811-2
日期:1993.10
A nine-step synthesis of the benzimidazole analogue, 2, of mycophenolicacid is reported involving both the BF3-Et2O catalysed aromatic amino- and the ortho ester Claisen rearrangements as key steps.