Eine neue 2??Allylphenol??Cumaran??Umlagerung

E Schmid, G Fráter, HJ Hansen…

文献索引：Schmid,E. et al. Helvetica Chimica Acta, 1972 , vol. 55, p. 1625 - 1674

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被引用次数: 27

摘要

Abstract 2-(1′-Arylallyl)-phenols (9, 10, 11, 12, 13, 14, 15, 16) are transformed on heating in N, N-diethylaniline at 225 into trans-2-aryl-3-methyl-coumarans (26, 29, 32, 34, 36, 38, 40, 42) in excellent yields. The corresponding cis-coumarans are minor products. Similar thermal behaviour is shown by 2-(1′-vinylallyl)-phenols (7, 8) which are thermally converted into trans-3-methyl-2-vinyl-coumarans (24, 19) and 5-methyl-2, 5-dihydro-(1- ...