Journal of Heterocyclic Chemistry p. 1119 - 1122 (1999)
Update date:2022-09-26
Topics:
Ahmed
Sensfuss
Habicher
Versatile 2-thioxopyrimidine-type building blocks ethyl 3-(2-ethoxy-2- oxoethyl)-4-oxo-2-thioxo-1,2,3,4,5,6,7,8- octahydropyrido[4',3':4,5]thieno[2,3-d]pyrimidine-7-carboxylate (4) and ethyl 4-oxo-2-thioxo-1,2,3,4,5,6,7,8-octahydropyrido[4',3':4,5]thieno[2,3- d]pyrimidine-7-carboxylate (8) were synthesized from diethyl 2-amino-4,5,6,7- tetrahydrothieno[2,3-c]pyridine-3,6-dicarboxylate (1). Derivatives of linear and angular heterocyclic systems having the imidazole and 1,2,4-triazole ring were obtained from the key intermediates 4 and 8, respectively.
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Doi:10.1007/s00044-010-9508-x
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