Synthesis of Benzylureas and Related Amine Derivatives via Copper-Catalyzed Three-Component Carboamination of Styrenes
作者:Jonathan J. Kennedy-Ellis、Erik D. Boldt、Sherry R. Chemler
DOI:10.1021/acs.orglett.0c02988
日期:2020.11.6
A direct assembly of secondary benzylureas and related amine derivatives via copper-catalyzed carboamination of styrenes with potassium alkyltrifluoroborates and ureas, anilines, or an amide is reported. Terminal and 1,2-disubstituted alkenes, as well as dienes, participate in this three-component coupling reaction. The reaction mechanism likely involves the addition of an alkyl radical to the styrene
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.