Total Synthesis of (+)-Galbulimima Alkaloid 13 and (+)-Himgaline

The stereoselective syntheses of (+)-himgaline ( 1 ) and (+)-GB13 ( 2 ) are described. Important diastereoselective bond constructions include an intramolecular Diels−Alder reaction, an intramolecular Michael addition, and an intramolecular enamine aldol addition.