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Preparation of fused [1,3,5] benzotriazepines by a tandem aza wittig/carbodiimide-mediated annelation reaction.

✍ Scribed by Pedro Molina; Antonio Arques; Asunción Alías

Book ID: 103400181
Publisher: Elsevier Science
Year: 1991
Tongue: French
Weight: 321 KB
Volume: 32
Category: Article
ISSN: 0040-4039
DOI: 10.1016/0040-4039(91)80667-u

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## Abstract magnified image The carbodiimides **2**, obtained from reactions of iminophosphorane **1** with isocyanates, reacted with hydrazine to give selectively 3‐amino‐2‐arylaminobenzothieno[3,2‐__d__]pyrimidin‐4(3__H__)‐ones **4**. Reactions of **4** with triphenylphosphine, hexachloroethane,