Cyclocondensation Reactions between 2-Acyl-3-indoleacetic Acid Derivatives and Phenylglycinol: Enantioselective Synthesis of 1-Substituted Tetrahydro-β-carboline Alkaloids
Cyclocondensation reactions between a variety of 2-acyl-3-indoleacetic acidderivatives and (R)-phenylglycinol were studied. Successful results were obtained from N-alkyl keto acidderivatives. The resulting tetracyclic lactams provide straightforward access to enantiopure 1-substituted tetrahydro-β-carboline alkaloids.