Catalytic Asymmetric Intramolecular α-Alkylation of Aldehydes
作者:Nicola Vignola、Benjamin List
DOI:10.1021/ja0392566
日期:2004.1.1
The development of a general catalyticasymmetricaldehyde alpha-alkylation reaction constitutes a major challenge in organic synthesis. Here, we report the first and successful approach toward its solution: (S)-alpha-methyl proline catalyzes the intramolecular alkylation of various halo aldehydes to the corresponding formyl cyclopentanes, -cyclopropanes, or -pyrrolidines in excellent yields and enantioselectivities