Reactions with 2??methyl??and 2??styryl??4??thiochromones

…, HA El??Bary, S Yassin, M Zahran

文献索引：Zeid, Ibrahim; El-Bary, Hamed Abd; Yassin, Salah; Zahran, Magdy Liebigs Annalen der Chemie, 1984 , # 1 p. 186 - 190

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被引用次数: 6

摘要

Abstract Diazoalkanes react with 2-methyl-and 2-styryl-4-thiochromones to yield the 1, 3- dithiolanes 1 and/or ethylenes 2–4. The latter are cleaved with thionyl chloride to give the corresponding ketones, while on fusion with sulfur they afford the corresponding thioketones. By condensation with compounds containing active hydrogen, such as malononitrile and ethyl cyanoacetate, the 2-methyl-and 2-styryl-4-thiochromones yield the ...