Efficient Enantioselective Reduction of Ketones with <i>Daucus carota</i> Root
作者:J. S. Yadav、S. Nanda、P. Thirupathi Reddy、A. Bhaskar Rao
DOI:10.1021/jo010399p
日期:2002.5.1
active alcohols are the potential chiral building blocks for the synthesis of pharmaceutically important molecules and asymmetricchiral ligands. Hence, this biocatalytic approach is found to be the most suitable for the preparation of a wide range of chiralalcohols and gave inspiration for the development of a new biotechnological process.
Enzymatic process for the preparation of optically active alcohols from ketones using tuberous root Daucus carota
申请人:Council of Scientific and Industrial Research
公开号:US07056540B2
公开(公告)日:2006-06-06
The present invention relates to an enzymatic process for the preparation of optically active chiral alcohols using tuberous root Daucus carota; particularly invention relates to an enzymatic process for the preparation of optically active alcohols by enantioselective reduction of corresponding ketones using tuberous root Daucus carota.
A series of enantiomerically pure γ-heteroatom substituted β-hydroxy esters were synthesized with high enantioselectivities (up to 99.1% ee) by hydrogenation of γ-heteroatom substituted β-ketoesters in the presence of Ru-(S)-SunPhos catalyst. These asymmetrichydrogenations provide key building blocks for a variety of naturally occurring and biologically active compounds.
Organocatalytic Selective [3 + 2] Cycloadditions: Synthesis of Functionalized 5-Arylthiomethyl-1,2,3-triazoles and 4-Arylthio-1,2,3-triazoles
作者:G. Surendra Reddy、L. Mallikarjuna Reddy、A. Suresh Kumar、Dhevalapally B. Ramachary
DOI:10.1021/acs.joc.0c02247
日期:2020.12.4
respectively, in a regioselective manner with high yields/rates. With controlled and online NMR experiments, we proved that the reaction path is following the organocatalytic enolization through selective deprotonation followed by a [1,3]-H shift. Surprisingly, the [3 + 2] cycloaddition of aryl/vinyl/alkyl azides with the in situ-generated equilibrated thermodynamic ↔ kinetic enolates furnished the highly
Facile domino reactions in the statistically controlled product- and stereoselective synthesis of densely functionalized cis-1,4-cyclohexa-1,4-dienes and trans,trans-trisubstituted-1,2,5,6-tetrahydropyridines
作者:Palani Sokkan Harikrishnan、Stephen Michael Rajesh、Subbu Perumal
DOI:10.1016/j.tetlet.2012.05.071
日期:2012.7
The domino reactions of ethyl 3-oxo-4-(arylsulfonyl)butanoates with aromatic aldehydes in a 2:1 molar ratio in the presence of a catalytic amount of ammonium acetate furnished densely functionalized cyclohexa-1,4-dienes stereoselectively, while the domino reactions of ethyl 3-oxo-4-(arylsulfonyl)butanoates, aromatic aldehydes, and ammonium acetate in a 1:2:2 molar ratio afforded highly functionalized 1,2,5,6-tetrahydropyridines stereoselectively. (C) 2012 Elsevier Ltd. All rights reserved.