Oxo-Sulfonylation of 1,7-Enynes via a Multicomponent Oxidative Radical Polar Crossover Approach.

Diastereoselective synthesis of -3,4-difunctionalized tetrahydroquinoline and chromane derivatives via the oxo-sulfonylation of 1,7-enynes is demonstrated. The reaction involves a three-component oxidative radical polar crossover (ORPC) approach wherein a vinyl carbocation intermediate undergoes nucleophilic substitution to afford the corresponding keto functional group. Deprotection of the N-Ts group, gram-scale synthesis, and other synthetic applications were illustrated.

Preclinical Development of Mahanine-Enriched Fraction from Indian Spice for the Management of Cancer: Efficacy, Temperature/pH stability, Pharmacokinetics, Acute and Chronic Toxicity (14-180 Days) Studies.

is well documented in the Indian ancient medical text "Charaka Samhita." The carbazole alkaloid "mahanine" from this plant exhibited anticancer activity against several cancers. Here, we have taken a comprehensive study to standardize the method for the preparation of a mahanine-enriched fraction (MEF) with the highest yield and defined markers.

Influence of Geographical and Seasonal Variations on Carbazole Alkaloids Distribution in : Deciding Factor of Its and Efficacies against Cancer Cells.

is a well-known Indian medicinal herb, and a carbazole alkaloid (mahanine) from this plant causes apoptosis in cancer cells. Here, we investigated how seasonal and geographical variations influence carbazole alkaloids composition and medicinal property of this plant against cancer cells and . Leaflets were collected from various places in different seasons for three years.