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ChemInform Abstract: An Efficient Synthesis of New Pyrido[4′,3′:4,5]thieno[2,3-d]pyrimidin-4(3H)-one Derivatives.

✍ Scribed by Guo-Ping Zeng; Yang-Gen Hu; Ming-Wu Ding

Publisher
John Wiley and Sons
Year
2009
Weight
35 KB
Volume
40
Category
Article
ISSN
0931-7597

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An efficient synthesis of new pyrido[4′,
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## Abstract A series of new 2‐substituted 3‐(4‐chlorophenyl)‐5,8,9‐trimethylthieno[3′,2′: 5,6]pyrido[4,3‐__d__]pyrimidin‐4(3__H__)‐ones **8** were synthesized __via__ an aza‐__Wittig__ reaction. Phosphoranylideneamino derivatives **6a** or **6b** reacted with 4‐chlorophenyl isocyanate to give carbo

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A series of new, 2-substituted 3-aryl-8,9,10,11-tetrahydro-5-methyl[1]benzothieno [3',2' : 5,6]pyrido [4,3-d]pyrimidin-4(3H)-ones, compounds 5a -q, were designed and synthesized via the aza-Wittig reaction as the key step. The iminophosphorane 1 reacted with phenyl isocyanate (or 4-chlorophenyl isoc