Pd-catalyzed alkoxycarbonylation of alkenes promoted by H2O free of auxiliary acid additive

被引：15

作者：

Liang, Wen-Yu ^{[1
]}

Liu, Lei ^{[1
]}

Zhou, Qing ^{[1
]}

Yang, Da ^{[1
]}

Lu, Yong ^{[1
]}

Liu, Ye ^{[1
]}

机构：

[1] East China Normal Univ, Sch Chem & Mol Engn, Shanghai Key Lab Green Chem & Chem Proc, 3663 North Zhongshan Rd, Shanghai 200062, Peoples R China

来源：

MOLECULAR CATALYSIS | 2020年 / 482卷

基金：

中国国家自然科学基金;

关键词：

Alkoxycarbonylation; Palladium hydride; In situ FT-IR analysis; PALLADIUM COMPLEXES; DIRECT CARBONYLATION; METHOXYCARBONYLATION; LIGANDS; HYDROESTERIFICATION; STYRENE; EFFICIENT; DIPHOSPHINES; MECHANISM; OLEFINS;

D O I：

10.1016/j.mcat.2018.10.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The Pd-catalyzed alkoxycarbonylation of alkenes using water as a promoter has been scarcely reported before. Herein, water instead of Bronsted/Lewis acid was found to effectively improve the catalytic performance of Pd (MeCN)(2)Cl-2-Xantphos system for alkoxycarbonylation of alkenes. Under the optimal conditions, the best yield of 97% was obtained for the target products (methyl 3-phenylpropanoate and methyl 2-phenylpropanoate) with L/B of 4.3 and TON of 192. With the involvement of water, Pd(MeCN)(2)Cl-2-Xantphos system also exhibited the moderate to good generality to alkoxycarbonylation of different kinds of alkenes with alcohols. The in situ high pressure FT-IR analysis verified that water played an important role in promoting formation and stability of Pd-H active species which was responsible for the efficient alkoxycarbonylation of alkenes. In addition, the ligand effect of Xantphos on this reaction was discussed.

引用

页数：6

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