摘要:
It has been found that 2,3,3-trimethyl-1-phenyl- and 1,2-dimethyl-3-spirocyclohexyltetrahydro-isoquinolines react with activated alkynes in methanol with cleavage of the tetrahydropyridine ring to give methoxybenzyl- and methoxyethylbenzenes, and in boiling acetonitrile form N-butenoyl derivatives from N-methylspirocylohexyltetrahydroisoquinoline by its reaction with acetylacetylene.