Zhongran Dai, Hong Chen, Mingguo Liu
2011
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Abstract
Abstract 7-Benzyl-5,6,7,8-tetrahydropyrido[4′,3′:4,5]thieno[2,3-d]pyrimidin-4(3H)-ones were synthesized by base catalyzed reactions of nucleophilic reagents (aliphatic amines, alcohols or phenols) with carbodiimides 4, which in turn were obtained by the aza-Wittig reaction of iminophosphoranes 3 with aromatic isocyanates.