Rongalite Promoted Highly Regioselective Synthesis of <i>β</i>-hydroxytellurides
作者:Dongsheng Sui、Feifei Wu、Qing Xu、Xiaochun Yu
DOI:10.3184/174751911x13049538828959
日期:2011.5
Ditellurides undergo facile cleavage on treatment with rongalite (sodium hydroxymethanesulfinate) to generate tellurium anions in situ, which undergo ringopening of epoxides in high regioselective manner. A simple, cost-effective method has been developed to prepare β-hydroxytellurides with good yields.
Lipase-catalyzed kinetic resolution of (RS)-hydroxy tellurides
作者:Alcindo A. Dos Santos、Carlos E. Da Costa、Jefferson L. Princival、João V. Comasseto
DOI:10.1016/j.tetasy.2006.07.024
日期:2006.9
The enzymatic resolution of racemic mixtures of hydroxy tellurides with a range of lipases has been investigated. Lipase-B from Candida antarctica (CALB) gave the best conversions, providing both enantiomers with high enantiomeric purity. A comparative study of the effect of solvent and substrate on the enzymatic kinetic resolution was performed. (c) 2006 Elsevier Ltd. All rights reserved.