Enantioselective addition of organozinc reagents to carbonyl compounds catalyzed by a camphor derived chiral γ-amino thiol ligand
作者:Hsyueh-Liang Wu、Ping-Yu Wu、Ying-Ni Cheng、Biing-Jiun Uang
DOI:10.1016/j.tet.2015.07.038
日期:2016.5
synthesis of the chiral camphor derived γ-amino thiol ligand 17 and its application in catalytic enantioselective carbon-carbon forming reactions through the addition of organozinc reagents to carbonyl compounds is described. The catalytic activity and enantioselectivity of ligand 17 is demonstrated in the enantioselective addition of various organozinc reagents to aldehydes and ketoesters, offering the corresponding
Cooperative Catalysis of Metal and OH⋅⋅⋅O/sp<sup>3</sup>-CH⋅⋅⋅O Two-Point Hydrogen Bonds in Alcoholic Solvents: Cu-Catalyzed Enantioselective Direct Alkynylation of Aldehydes with Terminal Alkynes
with a transition‐metal center in alcoholic solvents for enantioselective catalysis. Copper(I) complexes with prolinol‐based hydroxy amino phosphane chiral ligands catalytically promoted the directalkynylation of aldehydes with terminal alkynes in alcoholic solvents to afford nonracemic secondary propargylic alcohols with high enantioselectivities. Quantum‐mechanical calculations of enantiodiscriminating
Asymmetric synthesis of propargylic alcohols catalyzed by (−)-MITH
作者:Ping-Yu Wu、Hsyueh-Liang Wu、Ying-Ying Shen、Biing-Jiun Uang
DOI:10.1016/j.tetasy.2009.07.032
日期:2009.8
This investigation describes that in the presence of 2.5 mol % of (-)-2-exo-morpholinoisobornane-10-thiol (MITH) 1, catalytic asymmetric alkynylation of aldehydes gives enantioenriched propargylic alcohols with good enantioselectivities. (C) 2009 Elsevier Ltd. All rights reserved.
Asymmetric Direct Alkynylation Catalyzed by Chiral Ru−Bis(oxazolinyl)phenyl Complexes
作者:Jun-ichi Ito、Ryosuke Asai、Hisao Nishiyama
DOI:10.1021/ol1015338
日期:2010.9.3
Propargylic alcohols were obtained with excellent enantioselectivities in the asymmetric directalkynylation of aldehydes using 5 mol % of chiral ruthenium complexes containing the chiral bis(oxazolinyl)phenyl ligand.