A general method for the synthesis of the title compounds by a one-pot reaction is described. It consists in the double alkylation of lithium diphenylphosphide, obtained by the reaction of triphenylphosphine, lithium and tert-butyl chloride. This procedure can also be used for α-functional alkylating agents.
Unprecedented CP systems: Me3SiX (X=Br, I) catalyses rearrangements of PIII esters R′R′′POR into the corresponding phosphoryl systems, providing a simple, mild and efficient route to a variety of structures containing PC bonds. The mechanism has been found to be fundamentally different from that of the Arbuzov–Michaelis reaction and includes three definite steps a, b and c (see scheme).
USE OF CYCLOVINYL PHOSPHINE/COPPER COMPLEXES AS ARYLATION CATALYSTS
申请人:Taillefer Marc
公开号:US20100298569A1
公开(公告)日:2010-11-25
The invention relates to the use of cyclovinyl phosphine compounds in the form of complexes with copper, as catalysts for reactions leading to the formation of carbon-carbon and carbon-heteroatom bonds. The invention also relates to complexes of copper with at least one cyclovinyl phosphine, as well as to the method for creating a carbon-carbon or a carbon-heteroatom bond catalysed by a cyclovinyl phosphine/copper complex.
The cation radical vinylcyclopropane→cyclopentene rearrangement: reaction mechanism and periselectivity
作者:J.P. Dinnocenzo、D.A. Conlon
DOI:10.1016/0040-4039(95)01556-6
日期:1995.10
The vinylcyclopropane→cyclopentenerearrangement catalyzed by one-electron oxidation has been shown to be most consistent with a stepwise, cation radical mechanism. It was also discovered that the formal rearrangement periselectivity of vinylcyclopropanes with cis-alkyl substituents can be changed by one-electron oxidation.
ITQ-40 (INSTITUTO DE TECNOLOGÍA QUÍMICA number 40) is a new crystalline microporous material with a framework of tetrahedral atoms connected by atoms capable of bridging the tetrahedral atoms, the tetrahedral atom framework being defined by the interconnections between the tetrahedrally coordinated atoms in its framework. ITQ-40 can be prepared in silicate compositions with an organic structure directing agent. It has a unique X-ray diffraction pattern, which identifies it as a new material.