Syntheses and structure–activity relationship studies of piperidine-substituted quinolones as nonpeptide gonadotropin releasing hormone antagonists
摘要:
Syntheses and structure-activity relationships of piperidine-substituted quinolones as nonpeptide gonadotropin releasing hormone antagonists are described. Some of substituents on the piperidine ring that were investigated included a fused phenyl group, a (6R)-trifluoromethyl group, (6S) and (6R)-methyl group. This study showed that GnRH binding potency was tolerated by a small group at the 6-position of the piperidine, and blocking the 6-position by a trifluoromethyl group reduced clearance rate and increased oral bioavailability. (C) 2004 Elsevier Ltd. All rights reserved.
The results of a study dealing with the chemio- and diastereoselective reduction of chiral pyrrolidine and piperidine β-enamino esters 1, 2 and 3, 4 into β-amino esters are reported. This approach was successfully applied to a formal synthesis of (+)-calvine.
Total Synthesis of the Galbulimima Alkaloid (−)-GB17
作者:Reed T. Larson、Michael D. Clift、Regan J. Thomson
DOI:10.1002/anie.201108227
日期:2012.3.5
A tale of two Michaels: The first enantioselective totalsynthesis of (−)‐GB17 is reported. Construction of this unique naphthoquinolizinone skeleton was achieved by two stereoselective intramolecular Michael additions, one under catalyst control and the other under substrate control.