Tetrahedron p. 6781 - 6794 (1996)
Update date:2022-08-04
Topics:
Rodriguez-Morgade, Salome
Vazquez, Purificacion
Torres, Tomas
The aza-Wittig reaction of the triphenylphosphoranylideneamino-1,4-benzoquinone 1 with aryl isocyanates and aroyl chlorides allows the preparation of oxazolo[5,4-b]phenoxazine and benzoxazole derivatives. The same reaction using 7 as iminophosphoranoquinone provides substituted benzoxazoles and the previously unreported 4H-[3,1]benzoxazino-5,8-quinones.
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