作者:Daniela Acetti、Elisabetta Brenna、Claudio Fuganti、Francesco G. Gatti、Stefano Serra
DOI:10.1002/ejoc.200901006
日期:2010.1
Reduction of β-hydroxy ketones to the corresponding 1,3-diols by baker'syeast was investigated, in order to develop methods for simultaneous control over the configurations of multiple stereogenic centres. The reactions were found to be enantiospecific and generally characterised by good diastereoselectivity. Substrates with a substituent at the carbon atom in the α position were also considered.
Synthesis of Enantiomerically Pure β-Hydroxy Ketones via β-Keto Weinreb Amides by a Condensation/Asymmetric-Hydrogenation/Acylation Sequence
作者:Julian Diehl、Reinhard Brückner
DOI:10.1002/ejoc.201601202
日期:2017.1.10
an ester/amide exchange, and the use of the resulting β-hydroxy amide for the acylation of an organometallic compound. We shortened this route by showing that β-keto Weinreb amides are hydrogenated with up to 99 % ee in the presence of [Me2NH2]+[RuCl(S)-BINAP]2(µ-Cl)3}– (0.5 mol-%) at room temp./5 bar. These Weinreb amides were prepared by seemingly obvious yet unprecedented condensations of lithiated