Patent ID: 6201121
Filing Date: 2001-03-13
Classification: C07C,C07D

Abstract:
A process for preparing a 3-dihalobenzyl-2,4-quinazolinedione compound represented by the formula (V): ##STR11##which comprises:reacting a dihalobenzyl compound represented by the formula (III): ##STR12##with a 2,4-quinazolinedione compound having a carboxyalkyl group represented by the formula (I): ##STR13##in the presence of a water-containing solvent, to selectively substitute a hydrogen atom of an imino group at the 3-position of the compound (I),wherein, in the above formulae, X.sup.1, X.sup.2,and X.sup.3 are independently halogen, A is methylene, and L is a halogen.