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
一种简单,温和且稳定的方法,可通过2-甲基甲基的缩合反应立体选择性地合成(E)-甲基α-(3-甲酰基-1 H-吲哚-2-基)-β-芳基/烷基取代的丙烯酸酯首次介绍了使用L-脯氨酸(25 mol%)作为催化剂的具有多个烷基或芳基醛的(3-甲酰基-1 H-吲哚-2-基)乙酸酯。此外,通过我们的方法,已经开发出完全无金属的高产率方法,用于合成高度取代的生物学上重要的咔唑,γ-咔啉和海洋生物碱泼尼松二酮。