First methoxycarbonylation of the renewable β-myrcene: high selectivity through reduced isomerisation
First methoxycarbonylation of the renewable β-myrcene: high selectivity through reduced isomerisation
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可再生β-月桂烯的首次甲氧基羰基化:通过减少异构化实现高选择性
DOI:
10.1039/c3cy20734j
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发表时间:
2013
影响因子:
5
通讯作者:
A. Willstumpf. M. Dinges
中科院分区:
文献类型:
--
作者:
A. Behr;L. Johnen;A. Wintzer;A. Willstumpf. M. Dinges
A direct route from a renewable material to odoriferous methyl esters is presented with the first methoxycarbonylation of the monoterpene β-myrcene. A simple homogeneous catalyst system of Pd(OAc)2 and the bidentate ligand 1,4-bis(diphenylphosphino)butane (DPPB) in combination with low amounts of inexpensive acetic acid as an activator leads to a mixture of four isomers with a yield of 61%. The challenge of myrcene isomerisation induced through the necessary reaction conditions was overcome by systematic reaction optimisation. As an important parameter for the success of this reaction, the ester/isomer ratio was defined and improved during the research process. The atom economic reaction which uses the inexpensive bulk chemicals carbon monoxide and methanol could be upscaled to a multigram scale without the loss of activation.
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DOI:
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2006
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1953
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1993
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