Nucleophilic Addition of Alkanenitriles to Aldehydes via N-Silyl Ketene Imines Generated In Situ
作者:Fumihiko Yoshimura、Hiroki Saito、Taiki Abe、Keiji Tanino
DOI:10.1055/s-0036-1588424
日期:2017.9
2,2,6,6-tetramethylpiperidine, alkanenitriles undergo direct addition to aldehydes under mild non-basic neutral conditions to provide triisopropylsilyl ethers of β-hydroxy nitriles in good yield. The reaction proceeds through generation of an N-silyl ketene imine intermediate in situ from the alkanenitrile followed by nucleophilic addition of the intermediate to the aldehyde.
在用三氟甲磺酸三异丙基甲硅烷基酯和 2,2,6,6-四甲基哌啶处理后,烷腈在温和的非碱性中性条件下直接加成到醛中,以良好的收率提供 β-羟基腈的三异丙基甲硅烷基醚。该反应通过从链烷腈原位生成 N-甲硅烷基乙烯酮亚胺中间体,然后将中间体亲核加成到醛中来进行。