A method for preparing 1,2,3,4-tetrahydroisoquinolines comprising heating N-halo or hydroxyethyl-N-benzylamines in an aluminum chloride melt at 160.degree.-210.degree..
Method for preparing 7,8-dichloro-1,2,3,4-tetrahydroisoquinoline and N-chloroethyl-, N-bromoethyl- or N-hydroxyethyl-2,3-dichlorobenzylamine intermediate
申请人:SMITHKLINE BECKMAN CORPORATION
公开号:EP0008405A2
公开(公告)日:1980-03-05
A method for preparing 7,8-dichloro-1,2,3,4-tetrahydroisoquinoline comprising heating a N-chloro-, N-bromo- or N-hydroxyethyl-2,3-dichlorobenzylamine in an aluminum chloride melt at 160 to 210°C. A novel N-chloroethyl-, N-bromoethyl or N-hydroxyethyl- 2,3-dichlorobenzylamine intermediate is used as starting material for the cyclization.