An efficient catalytic system for the carbomethoxylation of ethylene oxide

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• 作者：Hoon Sik Kim ; Jin Yong Bae ; Je Seung Lee ; Cheong Il Jeong ; Dae Ki Choi ; Sang Ook Kang and Minserk Cheong
• 关键词：Methyl β ; -hydroxypropionate ; Propane-1 ; 3-diol ; Carbomethoxylation ; Ethylene oxide
• 刊名：Applied Catalysis A: General
• 出版年：2006
• 出版时间：10 February 2006
• 年：2006
• 卷：301
• 期：1
• 页码：75-78
• 全文大小：156 K

文摘

Methyl β-hydroxypropionate (MHP), an intermediate to propane-1,3-diol (PDO) was produced in high yield from the carbomethoxylation of ethylene oxide (EO) using a catalytic system consisting of Co₂(CO)₈ and ZnX₂L₂ (1: L = pyridine; 2: L = phosphine; X = Cl, Br, I). The carbomethoxylation was greatly influenced by the variation of temperature and CO pressure. The increase of temperature increased the EO conversion, but decreased the selectivity to MHP. On the contrary, both the yield and the selectivity of MHP increased with increasing CO pressure. FT-IR spectroscopic studies show that Co₂(CO)₈ interacts with (C₅H₅N)₂ZnBr₂, affording a new ionic cobalt carbonyl species.