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.)
To provide a process for producing a specific anthranilamide compound or its salt.
To provide a process for producing an anthranilamide compound represented by the formula (I) or its salt:
wherein each of R
1a
and R
3
which are independent of each other, is halogen or haloalkyl; R
2
is cyclopropyl alkyl or cyclobutyl alkyl; and Hal is a chlorine atom or a bromine atom, which comprises a step of selectively halogenating a compound represented by the formula (II):
wherein R
1a
, R
2
and R
3
are as defined above.