Monatshefte für Chemie/Chemical Monthly

Beiträge zur Chemie schwefelhaltiger Heterocyclen, 5. Mitt.: Weitere Reaktionen in der Reihe der 5, 6, 7, 8-Tetrahydro-[1] benzothieno [2, 3-d] pyrimidine

F Sauter

Index: Sauter,F. Monatshefte fuer Chemie, 1970 , vol. 101, p. 535 - 543

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Citation Number: 16

Abstract

Abstract 2, 4-Dioxo-1, 2, 3, 4, 5, 6, 7, 8-octahydro-[1] benzothieno [2, 3-d] pyrimidine was prepared in 3 different ways: by reaction of 2-amino-4, 5, 6, 7-tetrahydro-benzo [b] thiophene- 3-carboxamide with phosgene, by cyclization of 2-(N-carbethoxy-amino)-4, 5, 6, 7-tetrahydro- benzo [b] thiophene-3-carboxamide, or by thermal cyclization of ethyl 2-(N′-phenylureido)- benzo [b] thiophene-3-carboxylate. The corresponding 3-phenyl derivative was prepared ...