Intramolecular Pictet-Spengler reaction of N-alkoxytryptophans and tryptamines. 2. Synthesis of Corynanthe alkaloid derivatives containing a tetrahydro-1,2-oxazine as the D ring
Intramolecular Pictet-Spengler reaction of N-alkoxytryptophans and tryptamines. 2. Synthesis of Corynanthe alkaloid derivatives containing a tetrahydro-1,2-oxazine as the D ring