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
The synthesis of the new complexes [Ru(Cp*)(L)(MeCN)2][PF6] (L = Ph2POMe or Ph2P-o-tolyl) and Ru(Cp*)[Ph2PCH2C(tBu)=O](MeCN)}[PF6] (2a–c) is achieved starting from [Ru(Cp*)(MeCN)3][PF6]. The acetonitrile ligands in complexes 2a–c are labile, as emphasised by the easy formation of Ru(Cp*)(CO)2[Ph2PCH2C(=O)tBu]}[PF6] (3). The keto-phosphane is used as a tool to convert 3 into Ru(Cp*)(CO)[Ph2PCH2C(tBu)=O]}[PF6]
Ruthenium-CatalyzedO-Allylation of Phenols from Allylic Chloridesvia Cationic[Cp*(η3-allyl)(MeCN)RuX][PF6] Complexes
作者:Mbaye D. Mbaye、Bernard Demerseman、Jean-Luc Renaud、Loïc Toupet、Christian Bruneau
DOI:10.1002/adsc.200404023
日期:2004.6
from the reaction of [Cp*(MeCN)3Ru][PF6] with allylic halides were identified as intermediate catalytic species. An X-ray structure determination of the complex [Cp*(MeCHCHCH2)(MeCN)RuBr][PF6] disclosed an (endo-trans-MeCHCHCH2) allylic ligand. The structural information obtained from the study of Cp*(allyl)Ru(IV) complexes indicated that electronic effects at the coordinated allylic ligand likely account
The allylation of 1,3-dicarbonyl compounds and malononitrile with aliphaticallylicsubstrates is achieved under mild conditions in the presence of new rutheniumcatalysts. The ruthenium complex [Ru(C5Me5)(2-quinolinecarboxylato)(CH2CHCH-n-Pr)] [BF4] as a precatalyst, allows the synthesis of mono-allylated branched derivatives. On the other hand, the parent complex [Ru(C5Me5)(MeCN)3] [PF6] as a precatalyst
在新的钌催化剂的存在下,在温和的条件下,可以实现1,3-二羰基化合物和丙二腈与脂肪族烯丙基烯丙基的烯丙基化反应。钌配合物[Ru(C 5 Me 5)(2-喹啉羧基)(CH 2 CHCH- n -Pr )] [BF 4 ]作为前催化剂,可以合成单烯丙基化的支链衍生物。另一方面,母体[Ru(C 5 Me 5)(MeCN)3 ] [PF 6作为一种前催化剂,直接支持亲碳核素的双烯丙基化,从而导致双烯丙基化的双线性产物。两种预催化剂的参与提供了不对称混合线性支化双烯丙基化衍生物的顺序合成。
AN ELECTROREDUCTIVE SYNTHESIS OF ALLYLSILANES AND BENZYLSILANES
The electrochemical reduction of benzyl and allyl halides carried out in the presence of chlorotrimethylsilane afforded the corresponding benzylsilanes and allylsilanes in satisfactory yields.