A Cs2CO3-catalyzed hydrosilylation reaction of α-keto amides that proceeds through the in situ formation of MeSiH3 has been developed by using inexpensive polymethylhydrosiloxane in 2-methyltetrahydrofuran (2-MeTHF) as the solvent. A wide range of aryl and alkyl α-keto amides, prepared from anilines and alkylamines, were subjected to the hydrosilylation conditions to afford α-hydroxy amides in moderate
通过在2-甲基四氢呋喃(2-MeTHF)中使用廉价的聚甲基氢硅氧烷,开发了通过MeSiH 3原位形成的α-酮酰胺的Cs 2 CO 3催化的氢化硅烷化反应。将由苯胺和烷基胺制得的各种芳基和烷基α-酮酰胺置于氢化硅烷化条件下,以中等至极好的收率得到α-羟基酰胺。将该无过渡金属的方案应用于化学选择性氢化硅烷化反应,其中与简单酮相比,α-酮酰胺官能团的羰基发生还原,并进一步扩展至克级规程。
UREA AND AMIDE DERIVATIVES AND THEIR USE IN THE CONTROL OF CELL MEMBRANE POTASSIUM CHANNELS
申请人:NEUROSEARCH A/S
公开号:EP0693053B1
公开(公告)日:1999-01-20
Catalyst- and Additive-Free Chemoselective Transfer Hydrogenation of α-Keto Amides to α-Hydroxy Amides by Sodium Formate
A catalyst‐ and additive‐free chemoselective transfer hydrogenation of α‐keto amides to α‐hydroxy amides is easily achieved by using sodium formate as a hydrogen source. Control experiments suggest that the NH group of α‐keto amides is crucial for the chemoselective reduction through the formation of hydrogen bonds.