Stereoselective Synthesis of 3-Aryloctahydroindoles and Application in a Formal Synthesis of (−)-Pancracine
作者:Sunil V. Pansare、Rajinikanth Lingampally、Raie Lene Kirby
DOI:10.1021/ol902761a
日期:2010.2.5
A stereoselective synthesis of 3-aryloctahydroindoles from enantiomerically enriched γ-nitroketones has been developed. Reduction of imines derived form the nitroketones provides the trans-fused octhaydroindole motif selectively. The cis-octahydroindole skeleton is accessible by an invertive cyclization strategy involving a diastereomerically pure nitromesylate intermediate. This approach was employed
Asymmetric 1,4-Michael Addition in Aqueous Medium Using Hydrophobic Chiral Organocatalysts
作者:Chandan K. Mahato、Sayan Mukherjee、Mrinalkanti Kundu、Virbhadra P. Vallapure、Animesh Pramanik
DOI:10.1021/acs.joc.1c00124
日期:2021.4.2
the system will mimic the natural enzymatic reactions. In this work, a new set of proline-derived hydrophobic organocatalysts have been synthesized and utilized for asymmetricMichaelreactions in water as the sole reaction medium. Among the various catalysts screened, the catalyst 1 is indeed efficient for stereoselective 1,4-conjugated Michaeladditions (dr: >97:3, ee up to >99.9%) resulting in high