A facile and mild reduction procedure is reported for the preparation of chiral secondary alcohols prepared from α-substituted ketones using sodium borohydride and the chiral boronate ester (l)-TarB-NO2. Direct reduction of substituted ketones bearing Lewis basic heteroatoms generally provided secondary alcohols of only modest enantiomeric excess likely due to either competition between the target
Boranes in synthesis. 2. Asymmetric synthesis of β-amino alcohols. A facile conversion of 2-amino acetophenones to the corresponding β-amino alcohols in high enantiomeric purity
作者:David A. Beardsley、Gary B. Fisher、Christian T. Goralski、Lawrence W. Nicholson、Bakthan Singaram
DOI:10.1016/s0040-4039(00)76745-1
日期:1994.3
The asymmetric reduction of 2-amino acetophenones with Ipc2BH or Ipc2BCl at −78°C, yields the corresponding β-amino alcohols in good to excellent yields. Although only modest (12–45% ee) enantiomeric excesses were obtained with Ipc2BH, 75–99% enantiomeric excesses were obtained when Ipc2BCl was used as the asymmetric reducing agent.
Yadav, Ashok K.; Manju, Meera, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2006, vol. 45, # 12, p. 2770 - 2772
作者:Yadav, Ashok K.、Manju, Meera
DOI:——
日期:——
Enantioselective synthesis of optically active β-aminoalcohols via asymmetric reduction
作者:Byung Tae Cho、Yu Sung Chun
DOI:10.1016/s0957-4166(00)80269-4
日期:1992.1
Optically active beta-aminoalcohol derivatives were prepared by asymmteric reduction of the corresponding aminoketones with a chiral borohydride, K glucoride (1).
Beardsley David A., Fisher Gary B., Goralski Christian T., Nicholson Lawr+, Tetrahedron Lett, 35 (1994) N 10, S 1511-1514
作者:Beardsley David A., Fisher Gary B., Goralski Christian T., Nicholson Lawr+