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.
Expanding Insight into Asymmetric Palladium-Catalyzed Allylic Alkylation of N-Heterocyclic Molecules and Cyclic Ketones
作者:Nathan B. Bennett、Douglas C. Duquette、Jimin Kim、Wen-Bo Liu、Alexander N. Marziale、Douglas C. Behenna、Scott C. Virgil、Brian M. Stoltz
DOI:10.1002/chem.201300030
日期:2013.4.2
enaminones! Lactams and imides have been shown to consistently provide enantioselectivities substantially higher than other substrate classes previously investigated in the palladium‐catalyzed asymmetric decarboxylative allylic alkylation. Several new substrates have been designed to probe the contributions of electronic, steric, and stereoelectronic factors that distinguish the lactam/imide series as
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