Polymer-bound palladium-catalyzed cross-coupling of organoboron compounds with organic halides and organic triflates
作者:Su-Bum Jang
DOI:10.1016/s0040-4039(97)00171-8
日期:1997.3
The polymer-bound palladium-catalyzedcross-couplingreaction of electrophiles(i.e., halides and triflates) with organoboron compounds to form carbon-carbon bonds was achieved at mild conditions with very high activity in the Suzuki coupling reaction. The polymeric catalyst can be easily separated from a reaction mixture and reused more than 10 times with no decrease in activity
A stereospecific synthesis of conjugated (, )- and (, )-alikadienes by a palladium-catalyzed cross-coupling reaction of 1-alkenylboranes with 1-alkenyl bromides
作者:Norio Miyaura、Hiroshi Suginome、Akira Suzuki
DOI:10.1016/0040-4039(81)80166-9
日期:1981.1
The reactions of ()-1-alkenyldisiamylboranes with ()- or ()-1-alkenyl bromides in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium and sodium ethoxide gave the corresponding conjugated (,)- or (,)-alkadiene with high stereospecificity. The reactions of ()-1-alkenyl-1,3,2-benzodioxaboroles with ()- or ()-1-alkenyl bromides similarly gave the corresponding coupled products
Synthesis of 1,4-disubstituted (E,Z)-1,3-dienes from lithium dicyclohexyl(trans-1-alkenyl)(1-alkynyl)borates
作者:George Zweifel、Stephen J. Backlund
DOI:10.1016/s0022-328x(00)84873-1
日期:1978.8
Treatment of lithium dicyclohexyl(trans-1-alkenyl)(1-alkynyl)borates with either boron trifluoride etherate or tri-n-butyltin chloride results in the preferential migration of the alkenyl group from boron to the adjacent alkynyl carbon atom. Protonolysis of the resultant organoboron intermediates with acetic acid affords the corresponding 1,4-disubstituted (E,Z)-1,3-dienes in good yields, provided
Novel and convenient method for the stereo- and regiospecific synthesis of conjugated alkadienes and alkenynes via the palladium-catalyzed cross-coupling reaction of 1-alkenylboranes with bromoalkenes and bromoalkynes