Chemoenzymatic methods for the preparation of optically active cyclic polyazido alcohols from easily available achiral starting materials
摘要:
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
Synthesis of a library of stereo- and regiochemically diverse aminoglycoside derivatives
作者:Blandine Clique、Alan Ironmonger、Benjamin Whittaker、Jacqueline Colley、James Titchmarsh、Peter Stockley、Adam Nelson
DOI:10.1039/b505865a
日期:——
A library of forty modified aminoglycosides was prepared in which the configuration and regiochemistry of two or three rings was widely varied. The library was based around three core ring systems: the 2-deoxystreptamine ring system found in the natural products, and both enantiomers of (1R*,2R*,4R*,5R*)-2,5-diamino-cyclohexane-1,4-diol and (1R*,3R*,4R*,6R*)-4,6-diaminocyclohexane-1,3-diol. In each