| Efficient synthesis of 5,6-dihydrothieno[3′,2′:4,5]-thieno[2,3-d]pyrimidin-4(3H)-ones via an iminophosphorane |
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| 基金项目： | support of this work by the National Natural Science Foundation of China(No.20772041); Key Project of Science and Technology of Ministry of Education of China(No.107082) |
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| 摘 要： | 5,6-Dihydrothieno[3′,2′:4,5]thieno[2,3-d]pyrimidin-4(3H)-ones 6 were synthesized in yields of 71-87%by a consecutive method,which includes aza-Wittig reaction of iminophosphorane 3 with aromatic isocynate to give carbodiimide 4 and subsequent reaction of 4 with various amines,phenols or alcohols in the presence of catalytic amount of sodium ethoxide or solid potassium carbonate.
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| 关 键 词： | 导口 落价 工价 砂石 日工 |
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