PREPARATION OF 1,7-DISUBSTITUTED-1,2,3,4-TETRAHYDROISOQUINOLINES
摘要:
A simple procedure for the preparation of 1,7-disubstituted-1,2,3,4-tetrahydroisoquinolines from 3,4-dihydroisoquinoline (2) is presented. This strategy overcomes the limitation of cyclisation approaches which generally require electron rich ring systems. A variety of 1-substituents has been incorporated using the appropriate organometallic or activated methylene nucleophile to prepare both electron rich (7a-f) and electron deficient 1,7-disubstituted-1,2,3,4-tetrahydroisoquinolines (16, 17).
A Novel Cyclization of Electron Deficient N-Benzenesulfonyl-b-phenethylamines Using Ethyl Chloro(methylthio)acetate. Synthesis of Ethyl 1,2,3,4-Tetrahydroisoquinoline-1-carboxylates