Derivatives of Condensed Thieno[2,3-d]pyrimidines. 15. Synthesis of 2-Substituted 3-Amino-6,6-dimethyl-5,6-dihydro-8H-pyrano[4'3':4,5]thieno[2,3-d]pyrimidin-4-ones
✍ Scribed by A. P. Mkrtchyan; A. S. Noravyan; V. M. Petrosyan
- Book ID
- 110336161
- Publisher
- Springer US
- Year
- 2002
- Tongue
- English
- Weight
- 131 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0009-3122
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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
## 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