Primary Alkylboronic Acids as Highly Active Catalysts for the Dehydrative Amide Condensation of α-Hydroxycarboxylic Acids
作者:Risa Yamashita、Akira Sakakura、Kazuaki Ishihara
DOI:10.1021/ol401537f
日期:2013.7.19
Primaryalkylboronicacids such as methylboronic acid and butylboronic acid are highly active catalysts for the dehydrative amide condensation of α-hydroxycarboxylic acids. The catalytic activities of these primaryalkylboronicacids are much higher than those of the previously reported arylboronic acids. The present method was easily applied to a large-scale synthesis, and 14 g of an amide was obtained
Stereoselective Pseudomonas cepacia lipase mediated synthesis of α-hydroxyamides
作者:Maciej Adamczyk、Jonathan Grote、Sushil Rege
DOI:10.1016/s0957-4166(97)00270-x
日期:1997.8
α-hydroxyamides via the Pseudomonascepacialipase catalyzed amidation of α-hydroxyesters in non-aqueous media is described. Reactivities of α-hydroxy benzylesters are excellent, resulting in rapid conversions to good yields of α-hydroxyamides, while ethyl and methyl esters react more slowly, and some hindered esters show no reactivity under the conditions studied. Some benzylesters react stereoselectively