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.
Sulfated Zirconia: An Efficient and Reusable Heterogeneous Catalyst in the Friedel–Crafts Acylation Reaction of 3-Methylindole
作者:Darío A. Vargas、Leticia J. Méndez、Alicia S. Cánepa、Rodolfo D. Bravo
DOI:10.1007/s10562-017-2057-x
日期:2017.6
efficient process for the Friedel–Crafts acylation of 3-methylindole with acid anhydrides in the presence of sulfated zirconia was developed. This catalyst shows excellent catalytic activity with good conversion and selectivity towards formation of the products of 2-acylation (3-methyl-1H-indol-2-yl)ketones. Other advantages related to this process are the simple work-up procedure and smaller production