The KHMDS-catalyzed tertiary alkylation of aldehydes, ketones or imines using tertiary benzylic organoboronates is reported. This protocol permitted the use of tertiary benzylic alkylboronates as t...
The transition‐metal‐free cross‐coupling of alkyl or aryl electrophiles by using tertiary benzylic organoboronates is reported. This reaction involves the generation of tertiary alkyl anions from organoboronates in the presence of an alkoxide base and then their substitution reactions. This protocol allows the simple and efficient construction of quaternary carbon centers.
Synthesis of Highly Enantioenriched C-Tertiary Amines From Boronic Esters: Application to the Synthesis of Igmesine
作者:Viktor Bagutski、Tim G. Elford、Varinder K. Aggarwal
DOI:10.1002/anie.201006037
日期:2011.2.1
Better than all the rest: Tertiaryboronicesters, readily available using the lithiation–borylation reaction, have been converted into tertiary alkylamines in very high ee. The work has been applied to a short, modular, and fully stereocontrolled synthesis of the pharmaceutical igmesine and chiral 2,2‐disubstituted piperidines.