Preparation of triesters by palladium-catalyzed vicinal carbonylation of 1-substituted-3-methoxycarbonyl-2-propynyl methyl carbonates
摘要:
The palladium-catalyzed vicinal carbonylation of the 1-substituted-3-methoxycarbonyl-2-propynyl methyl carbonates 6 proceeds at room temperature under atmospheric pressure of CO to give the triesters 7 in good yields.
Stereodivergent Total Synthesis of Hapalindoles, Fischerindoles, Hapalonamide H, and Ambiguine H Alkaloids by Developing a Biomimetic, Redox-Neutral, Cascade Prins-Type Cyclization
作者:Samrat Sahu、Beauty Das、Modhu Sudan Maji
DOI:10.1021/acs.orglett.8b02804
日期:2018.10.19
redox-neutral, Brønsted acid-catalyzed cascade Prins-type cyclization between indole and aldehyde is described to access several structurally diverse indole terpenoid scaffolds in a single step. Applying this concept, stereodivergent total syntheses of nine hapalindole-type alkaloids are accomplished. Key transformations include allylation using geometrically isomeric allylboronic acid followed by a