METHOD FOR PRODUCING NITROGEN-CONTAINING FUSED RING COMPOUND

摘要

It is intended to provide a method for producing an excellent compound effective in the treatment, prevention or the like of pathological conditions associated with uric acid such as hyperuricemia, tophus, acute gouty arthritis, chronic gouty arthritis, gouty nephropathy, urolithiasis, renal dysfunction, coronary artery disease and ischemic heart disease and a method for purifying the same. By reacting a compound represented by the general formula [3] or a salt thereof and a compound represented by the general formula [4] or a reactive derivative thereof, a compound represented by the general formula [2] or a pharmaceutically acceptable salt thereof can be produced. Further, the crystallization of the compound represented by the general formula [2] can be conduced with an industrially excellent workability and a high quality crystal of the compound represented by the general formula [2] can be obtained. [3] [4] [2] (In the formulae, each symbol is as described in the specification.)