Patent ID: 6114524
Filing Date: 2000-09-05
Classification: C07D

Abstract:
A process for producing a compound represented by formula (II): ##STR22## wherein X is a halogen atom, each of A.sup.1, A.sup.2 and A.sup.3 are the same or different, and are selected from a carbon atom or a nitrogen atom, provided that at least one of A.sup.1, A.sup.2 and A.sup.3 is a nitrogen atom, each of R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are the same or different, and are selected from the group consisting of a hydrogen atom, a lower alkyl group, a cyano group, a carboxyl group, a lower alkoxycarbonyl group, a halogen atom, and a nitro group, provided that where R.sup.1 and R.sup.2 are adjacent to each other, R.sup.1 and R.sup.2 may be combined with each other to form a 5- or 6-membered ring which may carry on the ring thereof one substituent selected from the group consisting of a lower alkyl group, a nitrile group, a carboxyl group, a lower alkoxycarbonyl group, a carbamoyl group, a halogen atom, and a nitro group which comprises reacting a compound represented by the formula (I): ##STR23## wherein each of R.sup.10, R.sup.20, R.sup.30 and R.sup.40 may be the same or different, and are selected from a hydrogen atom, a lower alkyl group, a cyano group, a carboxyl group, a lower alkoxycarbonyl group, a carbamoyl group, a halogen atom, a nitro group, provided that in cases where R.sup.10 and R.sup.20 are adjacent to each other, R.sup.10 and R.sup.20 may be combined with each other to form a 5- or 6-membered ring which may carry on the ring thereof one substituent selected from the group consisting of a lower alkyl group, a nitrile group, a carboxyl group, a lower alkoxycarbonyl group, a carbamoyl group, a halogen atom, a nitro group and A.sup.1, A.sup.2 and A.sup.3 are as defined above, with a quaternary ammonium halide in the presence of phosphorus pentoxide.