Addition of CCl4 to olefins catalyzed by chromium and ruthenium complexes: The influence of water as a nucleophilic additive
作者:R. I. Khusnutdinov、N. A. Schadneva、T. M. Oshnyakova、U. M. Dzhemilev
DOI:10.1134/s0965544109040136
日期:2009.7
feasibility of the addition of CCl4 to linear and cyclic olefins and dienes in the presence of chromium and ruthenium complexes was established. The influence of water as a nucleophilic additive and the influence of the olefin nature, the catalyst central atom, and its ligand environment on the reaction selectivity and product yields were investigated. It was shown that the addition of water to chromium and
Palladium-catalyzed haloallylation of aromatic ynol ethers with allyl chlorides: a highly regio- and stereoselective approach to (1E)-α-chloroenol ethers
Described herein is a Pd-catalyzed haloallylation of aromatic ynol ethers and allyl chlorides, allowing facile access to (1E)-α-chloroenol ethers in a highly regio- and stereoselective manner. The synthetic utility of this method is demonstrated well by the synthesis of the stereodefined multisubstituted enol ethers and α-allylated carbonyl compounds.
Etude de l'alkylation d'organolithiens allyliques monochlores: Synthese en une etape de chlorures allyliques secondaires ou tertiaires et/ou de chlorures vinyliques de configuration Z
作者:B. Mauze、P. Ongoka、L. Miginiac
DOI:10.1016/0022-328x(84)85127-x
日期:1984.3
Le chloroallyllithium et le gem-chloro(méthyl) allyllithium réagissent facilement avec une large variété d'agents alkylants, pour conduire, en une seule étape, à des chlorures allyliques secondaires ou tertiaires et/ou à des chlorures vinyliques de configuration Z.
乐chloroallyllithium等乐宝石氯(甲基)烯丙基锂réagissentfacilement AVEC UNE大综艺D'代理alkylants,倒conduire,EN UNE seule ETAPE,一个DES chlorures allyliques次级线圈,欧tertiaires等/ OU一个DES chlorures vinyliques去配置ž。
Verfahren zur Herstellung von halogenalkylsubstituierten Oxiranen
申请人:BAYER AG
公开号:EP0000554A1
公开(公告)日:1979-02-07
Die vorliegende Erfindung betrifft ein verbessertes Verfahren zur Herstellung von halogenalkylsubstituierten Oxiranen aus halogenalkylsubstituierten Olefinen und Percarbonsäuren in organischer Lösung in hohen Ausbeuten und großer Reinheit welches dadurch gekennzeichnet ist, daß man ein chloralkyloder bromalkylsubstituiertes Monoolefin der allgemeinen Formel
mit einer Lösung einer 3 bis 4 Kohlenstoffatome enthaltenden Percarbonsäure in einem chlorierten, 1 bis 8 Kohlenstoffatome enthaltenden Kohlenwasserstoff bei einem Molverhältnis von Monoolefin zu Percarbonsäure von 1,1 : 1 bis 10 : 1 und bei einer Temperatur von 30 bis 100°C umsetzt.
Method for the preparation of cis-alkenyl bromide and acetate
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP0038052A1
公开(公告)日:1981-10-21
A novel and improved synthetic route for the preparation of several kinds of cis-alkenyl acetates of the formula RCH=CHCH2CH2[CH2]nOCOCH3, in which R is an alkyl group having from 1 to 8 carbon atoms and n is a positive integer from 1 to 10, which compounds are known as sexual pheromone compounds of various noxious insects utilizable as a powerful means for the extermination of the insects, is proposed. The inventive method comprises cross coupling reaction of a Grignard reagent of a cis-alken-3-yl chloride of the formula RCH= CHCH2CH2Cl with an α,ω-dibromoalkane of the formula Br(CH2)nBr to form a cis-alkenyl bromide of the formula RCH=CHCH2(CH2)nBr which is further reacted with an alkali metal acetate.