Tetrahedron

Synthesis and reactions of some chloro-2, 2-dimethylchromens

JD Hepworth, TK Jones, R Livingstone

文献索引：Hepworth, John D.; Jones, Terry K.; Livingstone, Robert Tetrahedron, 1981 , vol. 37, # 15 p. 2613 - 2616

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被引用次数: 17

摘要

5-, 6-, 7-, and 8-Chloro-2, 2-dimethylchromins have been prepared from the corresponding chloro-coumarin and their conversion into the 3, 4-dihalogenochroman derivatives is described. The 4-halogen atom is shown to be the more susceptible to hydrolysis by conversion of the resulting halohydrins into chromanones and epoxides. The formation of bis-chromens during the dehalogenation of 3-halogenochromanones is reported.