Phosphorus, Sulfur and Silicon and the Related Elements p. 95 - 107 (2005)
Update date:2022-08-05
Topics:
Ahmed
Abdel-latif
Ameen
Orthoaminoester 1 was investigated by the reaction with ethylchloroformate, 5-phenyl-oxadiazol-2-thione and triethylorthoformate to afford the open structures, 2, 13 and 15. These compounds were subjected to ensuing cyclization in one step or more yielding 3-substituted-5,6-dihydro-8H-4-oxopyrido[4′, 3′,4,5]thieno[2,3-d]pyrimidine-7(6H)-carboxylic acid ethyl ester derivatives. Copyright Taylor & Francis Inc.
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