Copper(I)-Catalyzed Oxidation of Alkenes Using Molecular Oxygen and Hydroxylamines: Synthesis and Reactivity of α-Oxygenated Ketones
作者:Alexander A. Andia、Matthew R. Miner、K. A. Woerpel
DOI:10.1021/acs.orglett.5b01120
日期:2015.6.5
The copper(I)-catalyzed oxidation of alkenes with molecularoxygen and N-hydroxyphthalimide (NHPI) or N-hydroxybenzotriazole (HOBt) provided α-oxygenated ketones. The reaction proceeded under a balloon of O2 at room temperature to furnish the dioxygenated products in 50–90% yield. These compounds, particularly the HOBt derivatives, can be further functionalized with phosphorus, nitrogen, and sulfur
Photostimulated Reactions of Vinyl Phosphate Esters with Triorganostannides. Evidence for an S<sub>RN</sub>1 Vinylic Mechanism
作者:Alicia B. Chopa、Viviana B. Dorn、Mercedes A. Badajoz、María T. Lockhart
DOI:10.1021/jo049762t
日期:2004.5.1
yields (45−89%). On the other hand, there is no reaction between (1-cyclohexenyl)DEP (5) or (1-benzylvinyl)DEP (18) with either 1 or 2, under similar conditions. These reactions appear to be strongly dependent on structural features of the vinyl phosphate since only conjugated vinyl phosphates afforded substitution products. These substitution reactions are completely regioselective and stereoconvergent
The title reaction in the presence of a catalytic amount of tetrakis(triphenylphosphine)palladium(0) affords alkylative coupling products in good to excellent yields in 1,2-dichloroethane at room temperature. This coupling reaction under C(sp2)–O cleavage proceeds stereospecifically. The reaction does not affect a coexisting vinyl sulfide group. This feature enables 1,2- and 1,3-carbonyl transposition
Carboncarbon bond formation by cross-coupling of enol phosphates with organoaluminium compounds catalyzed by palladium(O) complex
作者:Kazuhiko Takai、Koichiro Oshima、Hitosi Nozaki
DOI:10.1016/0040-4039(80)80120-1
日期:1980.1
Trialkylaluminium-mediated alkylation of enolphosphates under the CObond cleavage is performed stereospecifically in the presence of a catalytic amount of Pd(PPh3)4. Alkenylation and alkynylation are also described.