Preparation of the four stereoisomers of 3-bromo-2-butanol or their acetates via lipase-catalysed resolutions of the racemates derived from dl- or meso-2,3-butanediol
摘要:
The four stereoisomeric 3-bromo-2-butanols and/or their acetates were prepared via lipase-catalysed kinetic resolution by hydrolyses of the acetates of the (+/-)-syn- and (+/-)-anti-3-bromo-2-butanols, or via esterifications of the alc hols. The diastereomeric bromoacetates were obtained by syntheses from the dl- and meso-2,3-butanediols, respectively. On a preparative scale, the four stereoisomers, either as the free alcohols or as their acetates, were obtained in > 95% ee, and in 35-40% yield (based on the starting racemates). (c) 2005 Elsevier Ltd. All rights reserved.
Lichoscherstow; Alekseew, Zhurnal Obshchei Khimii, 1933, vol. 3, p. 927,930
作者:Lichoscherstow、Alekseew
DOI:——
日期:——
Reactions of 1,3-dioxacyclanes with acid halides a new synthesis for ω-halohydrine esters
作者:Stefan Kwiatkowski、Andrzej Wolinski
DOI:10.1007/bf01120981
日期:1984.6
Lichoscherstow; Petrow, Zhurnal Obshchei Khimii, 1939, vol. 9, p. 2015
作者:Lichoscherstow、Petrow
DOI:——
日期:——
The Role of Neighboring Groups in Replacement Reactions. I. Retention of Configuration in the Reaction of Some Dihalides and Acetoxyhalides with Silver Acetate<sup>1</sup>
作者:S. Winstein、R. E. Buckles
DOI:10.1021/ja01264a020
日期:1942.12
Winstein; Lucas, Journal of the American Chemical Society, 1939, vol. 61, p. 1577