Indium(I) Iodide Promoted Cleavage of Diphenyl Diselenide and Disulfide and Subsequent Palladium(0)-Catalyzed Condensation with Vinylic Bromides. A Simple One-Pot Synthesis of Vinylic Selenides and Sulfides
作者:Brindaban C. Ranu、Kalicharan Chattopadhyay、Subhash Banerjee
DOI:10.1021/jo052087i
日期:2006.1.1
a variety of substituted vinyl bromides in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium(0) [Pd(PPh3)4] in THF at room temperature to produce vinylic selenides and sulfides in good yields. The conversion of (E)-vinyl bromides is remarkably stereoselective giving (E)-vinyl selenides (and sulpfides) whereas the stereoselectivity in reaction of (Z)-vinyl bromides is not very
A variety of transition metal complexes catalyzed the regioselective hydroselenation of acetylenes. In particular, the palladium acetate-catalyzed reaction afforded the Markovnikov adducts with high selectivity.
Thiols added easily to acetylenic compounds in the presence of Et3B to give alkenyl sulfides in good yields. The reaction of acetylenes with 3-methyl-2-buten-1-thio1 gave dihydro-thiophene derivatives in one pot.
One-Pot Synthesis of 3-Substituted Isoxazoles from Phenyl Vinylic Selenide
作者:Shou-Ri Sheng、Xiao-Ling Liu、Qu Xu、Cai-Sheng Song
DOI:10.1055/s-2003-44354
日期:——
Phenylvinylicselenide was adopted for 1,3-Bipolar cycloaddition to nitrile oxides and subsequent oxidation-elimination furnished 3-substituted isoxazoles with good yields in a one-pot, two-step transformation.
One-pot synthesis of aziridines from vinyl selenones and variously functionalized primary amines
作者:Silvia Sternativo、Francesca Marini、Francesca Del Verme、Antonella Calandriello、Lorenzo Testaferri、Marcello Tiecco
DOI:10.1016/j.tet.2010.06.055
日期:2010.8
Variously substituted aziridines were conveniently prepared by an aza-Michael Initiated Ring Closure (aza-MIRC) reaction starting from vinyl selenones and primary amines, aminoalcohols or diamines. The reactions proceed in very high yields at room temperature in toluene or water. A significant rate acceleration was observed under aqueous conditions.