A catalyst-free, efficient green MCR protocol for access to functionalized γ-carbolines in water
作者:Anuradha Dagar、Soumen Biswas、Sampak Samanta
DOI:10.1039/c5ra08422a
日期:——
functionalized γ-carboline derivatives has been successfully realized in water through a one-pot three-component reaction involving several aryl/hetero-aryl/alkyl/alkenyl/alkynyl/ferrocenyl aldehydes, 3-formyl indole derivatives and ammonium acetate as a cheap N-source. The most important feature of the current methodology is that this hetero-annulation reaction of indole to γ-carboline can occur in good
l-Proline catalyzed stereoselective synthesis of (E)-methyl-α-indol-2-yl-β-aryl/alkyl acrylates: easy access to substituted carbazoles, γ-carbolines and prenostodione
作者:Soumen Biswas、Pradeep Kumar Jaiswal、Shivendra Singh、Shaikh M. Mobin、Sampak Samanta
DOI:10.1039/c3ob41573b
日期:——
A simple, mild and robust method for the stereoselective synthesis of (E)-methyl α-(3-formyl-1H-indol-2-yl)-β-aryl/alkyl-substituted acrylates via a condensation reaction of methyl 2-(3-formyl-1H-indol-2-yl)acetate with several alkyl or aryl aldehydes using L-proline (25 mol%) as a catalyst is presented for the first time. In addition, completely metal free based high yielding methods for the syntheses