Reactions of cyclic anhydrides XI. A facile approach to pyrrolo-3, 1-benzoxazinones via anilic acids.
作者:V. Balsubramaniyan、N.P. Argade
DOI:10.1016/s0040-4039(00)84563-3
日期:1986.1
:ortho-Carboxymaleanilic acids (I) undergo intramolecular double cyclisation to give pyrrolo-benzoxazinones (II) in excellent yields when treated with sodium acetate-acetic anhydride whereas the corresponding fumaranilic acids (III) under these conditions furnish 3, 1-benzoxazinones (IV.)