Highly Efficient Epoxidation of Olefins Using Aqueous H<sub>2</sub>O<sub>2</sub> and Catalytic Methyltrioxorhenium/Pyridine: Pyridine-Mediated Ligand Acceleration
作者:Joachim Rudolph、K. Laxma Reddy、Jay P. Chiang、K. Barry Sharpless
DOI:10.1021/ja970623l
日期:1997.7.1
Chemoenzymatic methods for the preparation of optically active cyclic polyazido alcohols from easily available achiral starting materials
Optically active 2,5-diazido-1,4-cyclohexanediol, 4,6-diazido-1,3-cyclohexanediol and 2,5-diazido-1,4-cyclohexanediol as precursors for polyfunctional cyclic amino alcohols were prepared by enzymatic hydrolysis of the respective butyrates with lipases from Candida rugosa (CRL), Pseudomonas cepacia (PCL), and Geotrichum candidum (GCL). The enantiomeric excesses obtained were very high. (C) 1996 Elsevier Science Ltd