Asymmetric Dihydroxylation of Esters and Amides of Methacrylic, Tiglic, and Angelic Acid: No Exception to the Sharpless Mnemonic!
作者:Fabian Weber、Reinhard Brückner
DOI:10.1002/ejoc.201403622
日期:2015.4
are contradictory and partly in conflict with the Sharpless mnemonic. We systematically screened the SAD of esters and amides of angelic, tiglic, and methacrylic acid. Enantiocontrol arose in 14 of the 15 reactions, culminating at 99 % ee for the Weinreb amide of tiglicacid. The absolute configurations of all the nonracemic products were established by (stereo)chemical correlations. Without exception