Patent ID: 7034166
Filing Date: 2006-04-25
Classification: C07D,Y02P

Abstract:
1. A process for producing a compound represented by the formula: wherein ring A is a benzene ring that may be optionally further substituted in addition to the group represented by W, and other symbols are as defined below, or a salt thereof; which comprises producing a compound represented by the formula: wherein R 1 and R 2 are the same or different and each is a hydrogen atom, an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group, or R 1 and R 2 may be taken together with the adjacent carbon atom to form an optionally substituted 3- to 8-membered homocyclic or heterocyclic ring, Y is a halogen atom, ring A is a benzene ring that may be optionally further substituted in addition to the group represented by Y, and ring B is an optionally substituted benzene ring, or a salt thereof by subjecting a compound represented by the formula: wherein Y′ is a hydrogen atom or a halogen atom, ring A is a benzene ring that may be optionally further substituted in addition to the group represented by Y′ and other symbols are as defined above, or a salt thereof to ring-closure reaction in the presence of an acid and thereafter, when Y′ is a hydrogen atom, halogenating the reaction product; and then, reacting the compound obtained above, or a salt thereof, with a compound represented by the formula: wherein W is: (i) a group represented by the formula:  wherein ring C is an optionally substituted benzene ring, and ring D is a 5- to 7-membered nitrogen-containing heterocyclic ring that may be optionally substituted with halogen or an optionally substituted hydrocarbon group, or (ii) a group represented by the formula:  wherein R