Studies directed at a synthesis of the morphine alkaloids. Regiocontrol in Robinson-type annulations of 2-(hydroxymethyl)-4-oxo-3-piperidinecarboxylic acid .gamma.-lactones
Studies directed at a synthesis of the morphine alkaloids. Regiocontrol in Robinson-type annulations of 2-(hydroxymethyl)-4-oxo-3-piperidinecarboxylic acid .gamma.-lactones