PROCESS FOR PRODUCTION OF 4-(SUBSTITUTED PHENYL)HEXAHYDROPYRIDO[2,1-C][1,4]OXAZIN-6-ONE

摘要

4-(Substituted phenyl)hexahydropyrido[2,1-c][1,4]oxazin- 6-one represented by formula (I) or a salt thereof is useful as an intermediate for the production of a bicyclic cinnamide compound which is an Aß production inhibitor. 4-(Substituted phenyl)hexahydropyrido[2,1-c][1,4]oxazin-6-one or the salt thereof can be produced in an industrially advantageous manner by subjecting a compound represented by formula (II) or a salt thereof to an intramolecular condensation reaction.