Matulenko, Mark A. Total Synthesis of (-)-Tetrahydropalmatine via Chiral Formamidine Carbanions: Unexpected Behavior with Certain Ortho-Substituted Electrophiles. [electronic resource] - The Journal of organic chemistry Jan 1996 - 573-580 p. digital Publication Type: Journal Article ISSN: 1520-6904 Standard No.: 10.1021/jo951611q doi