Highly Enantioselective Construction of a Chiral Tertiary Carbon Center by Alkynylation of a CyclicN-Acyl Ketimine: An Efficient Preparation of HIV Therapeutics
作者:Biao Jiang、Yu-Gui Si
DOI:10.1002/anie.200352301
日期:2004.1
The First Highly Enantioselective Alkynylation of Chloral: A Practical and Efficient Pathway to Chiral Trichloromethyl Propargyl Alcohols
作者:Biao Jiang、Yu-Gui Si
DOI:10.1002/adsc.200303237
日期:2004.5
A new, inexpensive chiral amino alcohol-based ligand, (1S,2S)-2-N,N-dimethylamino-1-(4-nitrophenyl)-3-(tert-butyloxy)propan-1-ol, was developed for the asymmetric alkynylation of chloral in high yield with up to 98% ee. The resulting chiral adduct (S)-1-trichloromethyl-3-phenyl-2-propyn-1-ol was hydrogenated over 10% Pd/C to give the useful intermediate chiraltrichloromethyl carbinol in quantitative