Synthesis of Homoprotoberberines and 8-Oxoprotoberberines by Sequential Bicyclization of Phenylacetamides
作者:Rafael Suau、Juan Manuel López-Romero、Antonio Ruiz、Rodrigo Rico
DOI:10.1016/s0040-4020(99)01084-4
日期:2000.2
The reaction of phenylacetamides with oxalylchloride/Lewis acid provides a convergent, high-yield entry to C-homoprotoberberine and 8-oxoprotoberberine alkaloids from available starting materials. This approach was used to synthesize 8-oxopseudopalmatine starting from N-[β-(3′,4′-dimethoxyphenyl)ethyl]-3,4-dimethoxyphenylacetamide. Some C-homoprotoberberines exhibit significant cytotoxicity against