A cross-couplingreaction of alkyltrifluorosilanes with arylhalides was achieved using a catalytic amount of tetrakis(triphenylphosphine)palladium(0) and excess of tetrabutylammonium fluoride (TBAF) at 100 °C with high chemoselectitvity. Functional groups like nitro, ketone carbonyl, and formyl tolerated the coupling conditions. Because potassium(18-crown-6) alkyltetrafluorosilicates also underwent
Regioselective Pd(0)-Catalyzed Hiyama Cross-Coupling Reactions at Dihalo-Substituted Heterocycles
作者:Thorsten Bach、Stefan Schweizer
DOI:10.1055/s-0029-1218528
日期:2010.1
The regioselectivity of the Hiyama cross-coupling reaction at various dihalo-substituted heterocycles has been studied. Methyl 2,3-dibromo-5-furancarboxylate and n-octyltrifluorosilane were employed to find optimum reaction conditions [CsF; Pd2dba3/P(2-furyl)3 as catalyst, 80-150 ËC in toluene or benzene] for the desired transformation. Subsequent experiments with the title compounds and with different primary alkyltrifluorosilanes illustrate the generality of this regiochemical process.
A variety of alkyltrifluorosilanes were found to couple with aryl halides in the presence of Pd(PPh(3))(4) catalyst and tetrabutylammonium fluoride (TBAF) to give the corresponding cross-coupled products in moderate to good yields.
A wide range of organosilicon compounds couples with enol and aryl triflates in the presence of Pd catalyst and fluoride ion
作者:Yasuo Hatanaka、Tamejiro Hiyama
DOI:10.1016/s0040-4039(00)94682-3
日期:1990.1
HATANAKA, YASUO;HIYAMA, TAMEJIRO, TETRAHEDRON LETT., 31,(1990) N9, C. 2719-2722