An efficient synthesis of new pyrido[4′,3′:4,5]thieno[2,3-<i>d</i>]-pyrimidin-4(3<i>H</i>)-one derivatives
作者:Yang-Gen Hu、Ming-Wu Ding、Guo-Ping Zeng
DOI:10.1002/jhet.5570450639
日期:2008.11
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(3H)-one 7 in the presence of catalytic amount of sodium alkoxide or solid potassium carbonate in satisfactory yields.
由亚氨基磷烷4与芳族异氰酸酯反应制得的碳二亚胺5与胺,酚或ROH反应,生成2取代的5,6,7,8-四氢吡啶并[4',3':4,5]噻吩并[2, 3 - d ]-嘧啶-4(3 H)-1在催化量的醇钠或固体碳酸钾存在下以令人满意的产率存在。