Nucleophilic Arylation of <i>N</i>
,<i>O</i>
-Ketene Acetals with Triaryl Aluminum Reagents: Access to α-Aryl Amides through an Umpolung Process
作者:Norihiko Takeda、Erika Futaki、Yukiko Kobori、Masafumi Ueda、Okiko Miyata
DOI:10.1002/anie.201708665
日期:2017.12.18
By the nucleophilic phenylation of O‐silyl N,O‐ketene acetals, generated in situ from N‐alkoxy amides, a phenyl group can be introduced onto the α‐carbon atom of amides through N−O bond cleavage in a two‐step, one‐pot process. The asymmetric synthesis of α‐aryl amides through the diastereoselective arylation of a chiral N,O‐ketene acetal is also described.
提出了一种新型的酰胺类α-芳基化方法。通过由N-烷氧基酰胺原位生成的O-甲硅烷基N,O-乙烯酮缩醛的亲核苯基化作用,可以通过N-O键裂解将苯基分为两步引入酰胺的α-碳原子上,一锅法。还描述了通过手性N,O-乙烯酮缩醛的非对映选择性芳基化反应制得的α-芳基酰胺的不对称合成。