Method for producing a 4,4-difluoro-3,4-dihydroisoquinoline derivatives

A large amount of 4,4-difluoro-3,4-dihydroisoquinoline derivatives is to provide a process for producing easily and efficiently. The general formula (1) A method for producing in represented by 4,4-difluoro-3,4-dihydroisoquinoline derivatives of general formula (2) Manufacturing method in the compound represented by reacting hydrogen fluoride.