Novel Synthons from Mucochloric Acid: The First Use of α,β-Dichloro-γ-butenolides and γ-Butyrolactams for Direct Vinylogous Aldol Addition
作者:Koushik Das Sarma、Ji Zhang、Timothy T. Curran
DOI:10.1021/jo062613l
日期:2007.4.1
Novel 5-(1'-hydroxy)-gamma-butyrolactone and gamma-butyrolactam subunits were synthesized by direct vinylogous aldol addition of alpha,beta-dichloro gamma-butyrolactones and gamma-butyrolactams with aldehydes under basic conditions. Different bases and solvents were screened in the context of generating gamma-butyrolactones. Diastereoselectivity was observed and gamma-butenolides and gamma-butyrolactams showed opposite diastereoselectivity under the same reaction condition.
Asymmetric Direct Vinylogous Aldol Reaction of Furanone Derivatives Catalyzed by an Axially Chiral Guanidine Base
作者:Hitoshi Ube、Naoki Shimada、Masahiro Terada
DOI:10.1002/anie.200906647
日期:2010.3.1
Ace of Base: The first highly enantioselective directvinylogousaldolreaction of dihalogenated or α‐thio‐substituted furanones with aldehydes utilizes an axially chiral guanidine base catalyst. The method provides facile access to enantioenriched γ‐substituted butenolides.
Synthesis, Molecular Docking, and Biofilm Formation Inhibitory Activity of 5-Substituted 3,4-Dihalo-5H-furan-2-one Derivatives on Pseudomonas aeruginosa
wounds and live as biofilm, which causes antibiotic resistance and wounds unhealed. To investigate the effects of 5‐substituted 3,4‐dihalo‐5H‐furan‐2‐one compounds on biofilm formation of P. aeruginosa, a set of 5‐(aryl‐1′‐hydroxy‐methyl)‐ or 5‐(aryl‐2‐methylene)‐3,4‐dihalo‐5H‐furan‐2‐one compounds were designed and synthesized. Their inhibitory activities on biofilm formation of P. aeruginosa were studied