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A convenient synthesis for some new pyrido[3′,2′:4,5]thieno-[3,2-d]pyrimidine derivatives with potential biological activity

✍ Scribed by Carlos Peinador; Vicente Ojea; José Ma. Quintela


Book ID
112130503
Publisher
Journal of Heterocyclic Chemistry
Year
1992
Tongue
English
Weight
593 KB
Volume
29
Category
Article
ISSN
0022-152X

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## Abstract magnified image The carbodiimides **5**, obtained from reactions of iminophosphorane **4** with aromatic isocyanates, reacted with amines, phenols or ROH to give 2‐substituted 5,6,7,8‐tetrahydropyrido[4′,3′:4,5]thieno[2,3‐__d__]‐pyrimidin‐4(3__H__)‐one 7 in the presence of catalytic am