SYNTHETIC APPLICATIONS OF FUNCTIONALIZED PHOSPHORANYLIDENEAMINO-1,4-BENZOQUINONES - PREPARATION OF OXAZOLO[5,4-B]PHENOXAZINE, 4H-[3,1]BENZCSXAZINO-5,8-QUINONE AND BENZOXAZOLE DERIVATIVES
S. Rodriguezmorgade et al., SYNTHETIC APPLICATIONS OF FUNCTIONALIZED PHOSPHORANYLIDENEAMINO-1,4-BENZOQUINONES - PREPARATION OF OXAZOLO[5,4-B]PHENOXAZINE, 4H-[3,1]BENZCSXAZINO-5,8-QUINONE AND BENZOXAZOLE DERIVATIVES, Tetrahedron, 52(19), 1996, pp. 6781-6794
The aza-Wittig reaction of the triphenylphosphoranylideneamino-1,4-ben
zoquinone 1 with aryl isocyanates and aroyl chlorides allows the prepa
ration of oxazolo[5,4-b]phenoxazine and benzoxazole derivatives. The s
ame reaction using 7 as iminophosphoranoquinone provides substituted b
enzoxazoles and the previously unreported 4H-[3,1]benzoxazino-5,8-quin
ones. Copyright (C) 1996 Elsevier Science Ltd