The enantiomers of Iralia®: preparation and odour evaluation
摘要:
The enantiomers of methyl ionones 1 and 2 were prepared by an enzyme-catalysed approach. Their odour properties were evaluated by skilful perfumers. (C) 2007 Elsevier Ltd. All rights reserved.
Biocatalytic Racemization of α-Hydroxy Ketones (Acyloins) at Physiological Conditions usingLactobacillus paracasei DSM 20207
作者:Bettina M. Nestl、Wolfgang Kroutil、Kurt Faber
DOI:10.1002/adsc.200606055
日期:2006.5
Biocatalytic racemization of open-chain and cyclic dialkyl-, alkyl-aryl- and diaryl-substituted acyloins was accomplished using whole resting cells of Lactobacillus paracasei DSM 20207. The mild (physiological) reaction conditions ensured the suppression of undesired side reactions, such as elimination or condensation. This novel biocatalytic isomerization protocol represents an essential tool for
Biocatalytic racemization of synthetically important functionalized α-hydroxyketones using microbial cells
作者:Bettina M. Nestl、Anne Bodlenner、Rainer Stuermer、Bernhard Hauer、Wolfgang Kroutil、Kurt Faber
DOI:10.1016/j.tetasy.2007.06.005
日期:2007.7
Biocatalytic racemization of straight-chain and cyclic acyloins bearing (halo)alkyl, alkenyl and functionalized (hetero)aryl moieties was accomplished using whole resting cells of bacteria, fungi and yeasts. Mild physiological reaction conditions ensured the suppression of undesired side-reactions, such as elimination or condensation. This biocatalytic protocol represents a useful tool for the clean racemization of unwanted enantiomers of synthetically important alpha-hydroxyketones derived from kinetic resolution. (c) 2007 Elsevier Ltd. All rights reserved.
Chiral dithiolane sulphoxides: An efficient stereoselective synthesis of (R) and (S)-3-benzoyloxy-2-butanone
作者:M.Teresa Barros、Alcino J. Leitão、Christopher D. Maycock
DOI:10.1016/0040-4039(95)01280-u
日期:1995.9
The effect of the addition of water on the asymmetric oxidation of an acyl dithiane and an acyl dithiolane has been studied. The use of enantiomerically pure dithiolane sulphoxides is demonstrated in a highly selective synthesis of (R)-3-benzoyloxy-2-butanone which depends upon a diastereoselective ketone reduction.