Humicola lanuginosa lipase-catalyzed enantioselective resolution of β-hydroxy sulfides: versatile synthons for enantiopure β-hydroxy sulfoxides
摘要:
Humicola lanuginosa lipase-catalyzed acylation of beta -hydroxy sulfides provides both the (R)- and (S)-enantiomers in high enantiomeric purity. In two cases the resolved hydroxy sulfides were oxidized to give beta -hydroxy sulfoxides in > 99% e.e. The effect of substituents on enantioselectivity is discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.
Cytotoxic compounds. Part XIII. Some 1-arylthiopropan-2-ols and 2-arylthiopropanols. Rearrangement of the primary methanesulphonates into the secondary isomers
作者:M. S. Khan、L. N. Owen
DOI:10.1039/j39710001448
日期:——
naphthyl compounds. Except for the 2,4-dinitrophenyl derivative (prepared in the normal way with methanesulphonyl chloride) the secondarymethanesulphonates could only be obtained by the use of methanesulphonic anhydride under special conditions. Of the primary alcohols, the 2,4-dinitrophenyl compound gave the primarymethanesulphonate but all the others gave mainly the secondarymethanesulphonates.
Humicola lanuginosa lipase-catalyzed acylation of beta -hydroxy sulfides provides both the (R)- and (S)-enantiomers in high enantiomeric purity. In two cases the resolved hydroxy sulfides were oxidized to give beta -hydroxy sulfoxides in > 99% e.e. The effect of substituents on enantioselectivity is discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.