✍ Scribed by Yang-Gen Hu; Ming-Wu Ding; Guo-Ping Zeng
No coin nor oath required. For personal study only.
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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 amount of sodium alkoxide or solid potassium carbonate in satisfactory yields.
📜 SIMILAR VOLUMES
## 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
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
## Abstract magnified image The thienopyridine derivative **2**, obtained from reaction of acetoacetic ester with **1** in the presence of tin tetrachloride, was treated with triphenylphosphine in hexachloroethane and Et~3~N to give iminophosphorane **3**. Iminophosphorane **3** reacted with pheny