Sterically hindered (pyridyl)benzamidine palladium(II) complexes: Syntheses, structural studies, and applications as catalysts in the methoxycarbonylation of olefins
作者:Saphan O. Akiri、Stephen O. Ojwach
DOI:10.1002/aoc.6439
日期:2021.12
afford square planar compounds. Activation of the palladium(II) complexes with para-tolyl sulfonic acid (PTSA) afforded activecatalysts in the methoxycarbonylation of a number of alkene. The resultant catalytic activities were controlled by the both the complex structure and alkene substrate. While aliphaticsubstrates favored the formation of linear esters (>70%), styrene substrate resulted in the formation
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。
Volatile Methyl Esters of Medium Chain Length from the Bacterium Chitinophaga Fx7914
The analysis of the volatiles released by the novel bacterial isolate ChitinophagaFx7914 revealed the presence of ca. 200 compounds including different methylesters. These esters comprise monomethyl- and dimethyl-branched, saturated, and unsaturated fatty acid methylesters that have not been described as bacterial volatiles before. More than 30 esters of medium C-chain length were identified, which
Addition of Carboxyalkyl Radicals to Alkenes through a Catalytic Process, Using a Mn(II)/Co(II)/O<sub>2</sub> Redox System
作者:Koji Hirase、Satoshi Sakaguchi、Yasutaka Ishii
DOI:10.1021/jo034584+
日期:2003.7.1
production of mono- and dicarboxylic acids by the addition of carboxyalkyl radicals to alkenes and dienes, respectively, was successfully developed through a catalytic process with use of Mn(II)/Co(II)/O(2) system. Thus, a variety of carboxylic acids were prepared by the reaction of alkenes and dienes with acid anhydrides in the presence of a very small amount of Mn(OAc)(2) (0.5 mol %) and Co(OAc)(2)