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.
Elongation and branching of α-olefins by two ethylene molecules
作者:Thomas Dietel、Fabian Lukas、Winfried P. Kretschmer、Rhett Kempe
DOI:10.1126/science.abm5281
日期:2022.3.4
α-Olefins are important starting materials for the production of plastics, pharmaceuticals, and fine and bulk chemicals. However, the selective synthesis of α-olefins from ethylene, a highly abundant and inexpensive feedstock, is restricted, and thus a broadly applicable selective α-olefin synthesis using ethylene is highly desirable. Here, we report the catalytic reaction of an α-olefin with two ethylene
Carbon–Carbon Bond Formation by Cross Coupling of Enol Phosphates or Enol Triflates with Organomanganese Compounds
作者:Keigo Fugami、Koichiro Oshima、Kiitiro Utimoto
DOI:10.1246/cl.1987.2203
日期:1987.11.5
Trialkylmanganese-mediated alkylation of enol phosphates is performed in the presence of a catalytic amount of Pd(PPh3)4. The cross coupling reaction catalyzed by Li2MnCl4 between enol triflates and Grignard reagents is also described.