Regiospecific palladium-catalyzed cycloaddition of aziridines and carbodiimides
摘要:
Bis(benzonitrile)palladium dichloride is an effective catalyst for the cycloaddition reaction of aziridines with carbodiimides to form imidazolidenimines in 40-94% yields. The process is a regiospecific one, involving cleavage of the more substituted ring carbon-nitrogen bond. An X-ray structure determination of one of the imidazolidinimines, together with spectral and analytical data for the products of all the cycloaddition reactions, provided the basis for the structure assignment.
Novel Palladium(II)-Catalyzed Cyclization of Aziridines and Sulfur Diimides
作者:Jin-Ook Baeg、Howard Alper
DOI:10.1021/ja00083a007
日期:1994.2
cyclization reaction of aziridines and sulfurdiimides, in toluene, affording imidazolidinethiones in 52-70% yield. Reaction of an aziridine, labels with 13 C at one of the ring carbons, with a sulfurdiimide resulted in incorporation of the label at the 2- and 5-positions of the imidazolidinethione. Thiazolidinimine formation results from the palladium(II)-catalyzed reaction of an aziridine with phenyl isothiocyanate
双(苯甲腈)二氯化钯是氮丙啶和二亚胺硫在甲苯中环化反应的有效催化剂,以 52-70% 的产率得到咪唑烷硫酮。氮丙啶(在环碳之一上带有 13 C 标记)与二亚胺硫的反应导致在咪唑烷硫酮的 2 位和 5 位引入标记。噻唑烷亚胺的形成是由钯 (II) 催化的氮丙啶与异硫氰酸苯酯的反应产生的
Carbonylative Ring Expansion of Aziridines to β-Lactams with Rhodium-Complexed Dendrimers on a Resin
作者:Shui-Ming Lu、Howard Alper
DOI:10.1021/jo030353r
日期:2004.5.1
Rhodium-complexed dendrimers, supported on a resin, were evaluated as catalysts for the carbonylative ringexpansion reactions of a variety of aziridines with carbon monoxide to give β-lactams. The effects of reaction temperature, solvent, time, and pressure of carbon monoxide on this transformation were also investigated. The dendritic catalysts showed comparable activity to the homogeneous analogue
Regiospecific metal-catalyzed ring expansion of aziridines to .beta.-lactams
作者:Howard Alper、Fabio Urso、David J. H. Smith
DOI:10.1021/ja00360a045
日期:1983.10
Carbonylation regiospecifique, catalysee par des complexes de rhodium, d'aziridines en azetidinones-2-
羰基化区域特异性,催化剂 par des complexes de rhodium, d'aziridines en azetidinones-2-
Enantiospecific and stereospecific rhodium(I)-catalyzed carbonylation and ring expansion of aziridines. Asymmetric synthesis of .beta.-lactams and the kinetic resolution of aziridines
作者:Serge Calet、Fabio Urso、Howard Alper
DOI:10.1021/ja00185a023
日期:1989.2
Regiospecific palladium-catalyzed cycloaddition of aziridines and carbodiimides
作者:Jin Ook Baeg、Howard Alper
DOI:10.1021/jo00027a030
日期:1992.1
Bis(benzonitrile)palladium dichloride is an effective catalyst for the cycloaddition reaction of aziridines with carbodiimides to form imidazolidenimines in 40-94% yields. The process is a regiospecific one, involving cleavage of the more substituted ring carbon-nitrogen bond. An X-ray structure determination of one of the imidazolidinimines, together with spectral and analytical data for the products of all the cycloaddition reactions, provided the basis for the structure assignment.