Malonic Ester Syntheses with Organosilicon Compounds. New Silicon-containing Malonic Esters, Mono- and Dicarboxylic Acids, Barbituric Acids and a Disiloxanetetracarboxylic Acid1
Palladium-catalyzed cross-coupling reaction of alkenyl bromides with potassium alkyltrifluoroborates
作者:Gary A. Molander、Jungyeob Ham、Dave G. Seapy
DOI:10.1016/j.tet.2006.10.088
日期:2007.1
The Suzuki-Miyaura-type cross-coupling reaction of potassium alkyltrifluoroborates with various alkenyl bromides in the presence of 10 mol % of PdCl(2)(dppf).CH(2)Cl(2) and 3.0 equiv of Cs(2)CO(3) in aqueous toluene at 80 degrees C provided the desired compounds in 49-95% yields. A variety of functional groups in the potassium alkyltrifluoroborates were tolerated under the basic conditions.
3-Chloro-2-[(diethoxyphosphoryl)oxy]-1-propene: a new reagent for a one-pot cyclopentenone annelation. Synthesis of desoxyallethrolone, cis-jasmone, and methylenomycin B
作者:S. C. Welch、J. M. Assercq、J. P. Loh、S. A. Glase