Bismuth(III) triflate-catalyzed synthesis of substituted 2-alkenylfurans.
Bismuth(III) triflate-catalyzed synthesis of substituted 2-alkenylfurans.
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三氟甲磺酸铋(III)催化合成取代的2-烯基呋喃
DOI:
10.1021/jo5009993
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
T. Bach
中科院分区:
文献类型:
--
作者:
D. Nitsch;T. Bach
A convergent synthesis of the title compounds is reported, which relies on a successive 2-fold SN′-type substitution reaction at methoxy-substituted propargylic acetates. The furan C3–C4 bond is presumably established by silyl enol ether attack at a propargylic cation intermediate. The resulting α-methoxyallene is intramolecularly substituted, leading to cyclization by displacement of the methoxy group (O–C2 bond formation) and to simultaneous formation of the exocyclic alkene double bond. Despite the relatively mild conditions, the reactions were complete within 5 min.
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DOI:
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发表时间:
1997
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影响因子:
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2006
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1996
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J. Marshall;Gary S. Bartley;E. Wallace
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影响因子:
2.1
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