A base-free rhodium-catalyzed Mizoroki-Heck (M-H) reaction using potassium aryltrifluoroborates as the arylating agent of alkenes and acetone as a green '' oxidant '' is described. Thanks to the ready availability of organoboranes, this reaction should constitute an interesting alternative to conventional M-H reactions using aryl halides.
A Highly Stereoselective TMSOTf-Mediated Catalytic Carbocupration of Alkynoates
作者:Amanda J. Mueller、Michael P. Jennings
DOI:10.1021/ol702546w
日期:2007.12.1
The TMSOTf-mediated catalytic carbocupration of ynoates has been investigated. It has been shown that catalyst loadings as low as 5 mol % readily allow for high yields and diastereoselectivities for a series of aromatic Grignard reagents. In addition, we have been successful in vicinally functionalizing 1a via initial TMSOTf-mediated catalytic carbocupration followed by a secondary electrophilic capture of the TMS allenoate intermediate.
KWART, H.;GAFFNEY, A., J. ORG. CHEM., 1983, 48, N 24, 4502-4508
作者:KWART, H.、GAFFNEY, A.
DOI:——
日期:——
SEGUINEAU, PASCALE;VILLIERAS, JEAN, TETRAHEDRON LETT., 29,(1988) N 4, 477-480