Synthesis of enantioenriched 2,2-disubstituted pyrrolidines via sequential asymmetric allylic alkylation and ring contraction
作者:Elizabeth L. Goldstein、Hirokazu Takada、Yuji Sumii、Katsuaki Baba、Brian M. Stoltz
DOI:10.1016/j.tet.2022.132940
日期:2022.9
The synthesis of a variety of enantioenriched 2,2-disubstituted pyrrolidines is described. A stereogenic quaternary center is first formed utilizing an asymmetricallylicalkylation reaction of a benzyloxy imide, which can then be reduced to a chiral hydroxamic acid. This compound can then undergo a thermal “Spino” ring contraction to afford a carbamate protected 2,2-disubstituted pyrrolidine stereospecifically
Pyrrolidinedione derivatives as antibacterial agents with a novel mode of action
作者:Jens Pohlmann、Thomas Lampe、Mitsuyuki Shimada、Peter G. Nell、Josef Pernerstorfer、Niels Svenstrup、Nina A. Brunner、Guido Schiffer、Christoph Freiberg
DOI:10.1016/j.bmcl.2004.12.002
日期:2005.2
The pseudopeptide pyrrolidinedione natural products moiramide B and andrimid represent a new class of antibiotics that target bacterial fatty acid biosynthesis. Structure activity relationship (SAR) studies revealed a high degree of variability for the fatty acid side chain, allowing optimization of physicochemical parameters, and a restricted SAR for the pyrrolidinedione group, indicating major relevance of this subunit for efficient target binding. (C) 2004 Elsevier Ltd. All rights reserved.