Lee, YunKlausen, Rebekka S.Jacobsen, Eric2012-05-142011Lee, Yunmi, Rebekka S. Klausen, and Eric N. Jacobsen. 2011. Thiourea-catalyzed enantioselective Iso-Pictet Spengler reactions. Organic Letters 13(20): 5564-5567.1523-7060http://nrs.harvard.edu/urn-3:HUL.InstRepos:8737995A one-pot condensation of isotryptamines and aldehydes that affords enantiomerically enriched 4-substituted tetrahydro-\(\gamma\)-carbolines is reported. The reaction is induced by a chiral thiourea/benzoic acid dual catalyst system. Purification of the N-Boc-protected products by trituration or crystallization provides the optically pure tetrahydro-\(\gamma\)-carboline derivatives in a scalable and highly practical procedure.en-USJournal Article2012-05-1410.1021/ol202300t