Protoberberine aus Reissert-Verbindungen, 7. Mitt. [1]. Diastereoselektive Reduktion von 1-benzylierten Isochinolin-Reissert-Verbindungen und Synthese von Oxoberbincarbonsäuren

β-Phenylethylamines and the isoquinoline alkaloids (July 1999 to June 2000)

“…120 Reduction of the enamide 110, followed by hydrolysis, affords O-methyl-8-oxobharatamine 13a-carboxylic acid 111. 121 Photocyclisation of the 1-benzylidenetetrahydroisoquinolines 112a and 112b has given the pseudoberberines 113a and 113b. 122 6Ј-Bromo-1,2-dehydroreticuline chloride 114 has been converted into the 12-bromo derivative of tetrahydropalmatine 104a in Cocculus laurifolius.…”