Formal Regiocontrolled Hydroboration of Unbiased Internal Alkynes via Borylation/Allylic Alkylation of Terminal Alkynes
作者:Abraham L. Moure、Pablo Mauleón、Ramón Gómez Arrayás、Juan Carlos Carretero
DOI:10.1021/ol4007663
日期:2013.4.19
boronates from terminalalkynes, a propargyl directing (2-pyridyl)sulfonyl group allows terminalalkynes to undergo Cu-catalyzed B2(pin)2-borylation and subsequent Cu-catalyzed allylic alkylation with Grignard reagents without affecting the pinacolboronate moiety, thereby formally enabling a highly stereo- and regiocontrolled access to hydroboration products of unbiased dialkyl internal alkynes.
Copper-catalyzed hydroboration of propargyl-functionalized alkynes in water
作者:Jessie S. da Costa、Roger K. Braun、Pedro A. Horn、Diogo S. Lüdtke、Angélica V. Moro
DOI:10.1039/c6ra14465a
日期:——
The Cu-catalyzed hydroboration of alkynes in operationally simple and environmentally friendly conditions is reported. The reactions are performed in water, at room temperature, under micellar catalysis. Conditions to form the α or β borylated products selectively have been found and as an application a protocol for the tandem hydroboration/Suzuki coupling in water was developed.