acyl-based carbanion equivalents. We herein report an alternative strategy that is based on the use of aldehydes as alkyl carbanion equivalents in a reductive coupling with aryl imines. A wide array of secondary amines can be synthesized in moderate to high yields. This reaction is mediated by hydrazine and catalyzed by ruthenium(II) complexes, and it tolerates various functional groups, such as esters, amides
Rapid C–H Transformation: Addition of Diarylmethanes to Imines in Seconds by Catalytic Use of Base
作者:Christian Weindl、Sebastian L. Helmbrecht、Lukas Hintermann
DOI:10.1021/acs.joc.2c02658
日期:——
The addition of diarylmethanes or methylarenes via activation of benzylic C(sp3)–H bonds to N-aryl imines proceeds under catalysis by alkali hexamethyldisilazide (HMDS) base to give N-(1,2,2-triarylethyl)anilines or N-(1,2-diarylethyl)anilines, respectively. In the presence of 10 mol % of LiHMDS at room temperature, the diarylmethaneaddition equilibrates within 20–30 s and is driven to near completion