Selective Mono- and Bis(alkoxycarbonylation)s of Olefins Catalyzed by Palladium in the Presence of Cu(I) or Cu(II) Chloride under Remarkably Mild Conditions. Application to the Synthesis of γ-Butyrolactone Derivatives
Palladium-catalyzed mono- and bis(alkoxycarbonylation)s of olefins were controlled by the use of copper(II) and copper(1) chloride, respectively, in alcohol under normal pressure of carbon monoxide and oxygen at room temperature without any other additives. 3-Buten-1-ols gave the corresponding γ-butyrolactones and 2-oxotetrahydrofuran-3-acetic acid esters, respectively, in high yields.
Selective Mono- and Dicarbonylation of Terminal Olefins Catalyzed by Pd–C in the Presence of Cu(II) or Cu(I) Chloride under Mild Conditions
作者:Katsuhiko Inomata、Shiho Toda、Hideki Kinoshita
DOI:10.1246/cl.1990.1567
日期:1990.9
Pd–C can catalyze the carbonylation of terminal olefins with normal pressure of carbon monoxide at room temperature. The corresponding mono- and diesters (succinates) were selectively formed in excellent yields using Cu(II) and Cu(I) chloride, respectively, in alcohol.
Pd-C可以在常压下在一氧化碳常压下催化末端烯烃的羰基化反应。分别使用氯化铜 (II) 和氯化铜 (I) 在醇中选择性地形成相应的单酯和二酯(琥珀酸酯),收率极好。
Substrate Specificity of Regiospecific Desaturation of Aliphatic Compounds by a Mutant<i>Rhodococcus</i>Strain
作者:Kenzo KOIKE、Mikio TAKAIWA、Yoshiharu KIMURA、Shigeo INOUE、Susumu ITO
DOI:10.1271/bbb.64.1064
日期:2000.1
Substrate specificity of cis-desaturation of alipahtic compounds by resting cells of a mutant, Rhodococcus sp. strain KSM-MT66, was examined. Among substrates tested, the rhodococcal cells were able to convert n-alkanes (C13-C19), 1-chloroalkanes (C16 and C18), ethyl fatty acids (C14-C17) and alkyl (C1-C4) esters of palmitic acid to their corresponding unsaturated products of cis configuration. The products from n-alkanes and 1-chloroalkanes had a double bond mainly at the 9th carbon from their terminal methyl groups, and the products from acyl fatty acids had a double bond mainly at the 6th carbon from their carbonyl carbons.
The first iron-catalyzed cross-coupling reaction of alkyl halides with alkylaluminum reagents (alkyl–alkylNegishi coupling) is developed using an iron/bisphosphine catalyst system. The reaction sh...
In the presence of phenylsilane and a catalytic amount of indium(III) acetate, organic iodides added to electron-deficientalkenes in ethanol at room temperature. Both simple and functionalized organic iodides were applicable to this reaction. A plausible reaction mechanism involves the formation of indium hydride species by hydride transfer from silicon to indium and an indium hydride-mediated radical