Note on Attempts to Prepare Ring-B Homomorphinan-6-ones byGrewe Cyclization from Octahydro-1-phenethylisoquinolines
作者:Raymond Dumont、Hanspeter Pfander、Arnold Brossi
DOI:10.1002/hlca.19850680806
日期:1985.12.18
Grewe cyclization of the N-formyl-protected octahydroisoquinolin-6-one 1 prepared by conventional chemistry did not afford the expected homomorphinanone. The exclusive reaction product obtained in good yield was the α,β-unsaturated N-formyloctahydroisoquinolin-6-one 2, further converted by acid hydrolysis into the crystalline octahydroisoquinolin-6-one 8.