
Monatshefte fur Chemie p. 691 - 695 (1991)
Update date:2022-08-03
Topics: Reactions Thiourea Fused heterocycles
Levai, Albert
Reactions of 3-arylidenechromanones (1-4) and -1-thiochromanones (5-8) with thiourea gave thiazines (9-16) under acidic and pyrimidine derivatives (17-21) under alkaline reaction conditions. Keywords.Benzopyrano<4,3-d>pyrimidines; Benzothiopyrano<4,3-d>py
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