Tetrahedron

The regioselectivity of rhodium and palladium-catalysed cyclisations of 2-bromo-1, 6-and-1, 7-dienes

R Grigg, P Stevenson, T Worakun

文献索引：Grigg, Ronald; Stevenson, Paul; Worakun, Tanachat Tetrahedron, 1988 , vol. 44, # 7 p. 2033 - 2048

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被引用次数: 72

摘要

2-Bromo-l, 6-dienes are catalytically cyclised to a mixture of the corresponding 3, 4-bis (methylene) cyclopentane and 5-methylenecyclohex-3-ene. Wilkinson's catalyst shows good selectivity for the 5-membered ring product whilst palladium catalysts, in general, show little selectivity, Addition of tetraethylammonium salts, especially the chloride, allow the palladium catalysed reactions to be carried out at 30° C in good yield and with high selectivity for the ...