Tetrahedron

Preparation and synthetic applications of iminophosphoranes derived from o-substituted arylazides: preparation of pyrazolo [1, 2-b] indazole, 4H-3, 1-benzoxazine …

P Molina, C Conesa, A Alías, A Arques, MD Velasco…

Index: Molina, Pedro; Conesa, Carlota; Alias, Asuncion; Arques, Antonio; Velasco, Maria D.; et al. Tetrahedron, 1993 , vol. 49, # 34 p. 7599 - 7612

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Citation Number: 30

Abstract

The Staudinger reaction of several ortho-substituted arylazides with triphenylphosphine has been studied. The reaction product is found to be strongly dependent on the nature of the ortho-substituent. The Aza Wittig-type reaction of iminophosphorane derived from the ortho- azido acetophenone with isocyanates and aroyl chlorides leads to the previously unreported 4-methylene-4H-3, 1-benzoxazine ring. The crystal and molecular structure of 2-[2-(4- ...

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Synthesis of N-acyl-, N-sulfonyl-, and N-phosphinylphospha (...

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