Synthesis of 3-Substituted-4H-1,4-benzoxazines.

Abstract Various 3-substituted-4 H -1,4-benzoxazines were prepared in good yields by lithiation-electrophilic substitution of the 4-Boc-4 H -1,4-benzoxazine. The synthesis of this carbamic derivative, in four steps from 2-aminophenol, was described.