Indium-mediated facile synthesis of 3-unsubstituted β-lactams
作者:Bimal K. Banik、Anjan Ghatak、Frederick F. Becker
DOI:10.1039/b002833i
日期:——
A simple synthesis of 3-unsubstituted β-lactams was achieved through indium-mediated reaction of imines with ethyl bromoacetate.
通过铟介导的亚胺与溴乙酸乙酯反应,实现了3-未取代β-内酰胺的简单合成。
Herstellung und Umsetzungen von ?-Lactamen
作者:Th. Haug、F. Lohse、K. Metzger、H. Batzer
DOI:10.1002/hlca.19680510828
日期:1968.10.31
The cycloaddition of N-chlorosulfonyl-isocyanate with isoprene, butadiene and a polyolefin as well as the reaction of ketenes with some bis-azomethines were investigated. Suitably substituted bis-azomethines could be separated in the rac. and the meso-form. The reactivity of the azetidinones towards hydrolysis and hydrogenation was tested. Attempts to polymerise 4-vinyl-azetidin-2-one, polyazetidinone
Studies on<i>N</i>-Activation for the Lipase-Catalyzed Enantioselective Preparation of β-Amino Esters from 4-Phenylazetidin-2-one
作者:Riku Sundell、Liisa T. Kanerva
DOI:10.1002/ejoc.201403467
日期:2015.3
effect of N-substitution was examined for the enantioselectivelipase-catalyzed ring-opening reaction of racemic 4-phenylazetidin-2-one with methanol in dry organic solvents. Marked differences in the reactivity of various N-protected 4-phenylazetidin-2-ones were observed. Preparative-scale reactions with Candida antarctica lipase B (Novozym 435 preparation) yielded N-acylated methyl (R)-3-amino-3-phenylpropanoates