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.
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.
A facile chemoenzymatic route to enantiomerically pure oxiranes: building blocks for biologically active compounds
作者:Ulrich Goergens、Manfred P. Schneider
DOI:10.1039/c39910001064
日期:——
The enantiomerically purebuildingblocks (R)-and (S)-1–4 were prepared both by enantioselective, enzymatic hydrolysis and by acyl transfer, and subsequently converted into the corresponding enantiomerically pure oxiranes (R)- and (S)-7 and 8.
Enzymatic kinetic resolution of organochalcogenides in supercritical CO2
作者:Rogério A. Gariani、Fernando A.G. Luengo、Luiz A.S. Vale、Reinaldo C. Bazito、João V. Comasseto
DOI:10.1016/j.tetlet.2011.04.073
日期:2011.6
1-(Phenylthio)-, 1-(phenylseleno)- and 1-(phenyltelluro)-propan-2-ol were efficiently resolved by CAL-B in sc-CO2. (C) 2011 Elsevier Ltd. All rights reserved.