Palladium-Catalyzed Synthesis of Aqueous, Fluorous, and Supercritical CO<sub>2</sub>-Soluble Phosphines
作者:Weiping Chen、Lijin Xu、Jianliang Xiao
DOI:10.1021/ol006203+
日期:2000.8.1
[GRAPHICS]A generic, simple, and economical route has been developed for the synthesis of phosphines soluble in aqueous, fluorous, and supercritical CO2 phases. The methodology is based on the palladium-catalyzed Heck olefination of haloary/phosphine oxides followed by reduction, affording various arylphosphines in high yields.
Palladium-catalyzed coupling reactions of bromo-substituted phenylphosphine oxides: a facile route to functionalized arylphosphine ligands
作者:Lijin Xu、Jun Mo、Colin Baillie、Jianliang Xiao
DOI:10.1016/s0022-328x(03)00663-6
日期:2003.12
The Heck reaction of OPPh3−n(4-C6H4Br)n (n=1–3) with electron deficient and neutral olefins led to linear olefin-substituted phenylphosphine oxides, whilst the reaction with an electron rich olefin in an ionic liquid solvent resulted in the formation of acetyl variants. The same bromophenylphosphine oxides also reacted with arylboronic acids under normal Suzuki coupling conditions, affording arylated
OPPh的Heck反应3- Ñ(4-C 6 H ^ 4溴)ñ(ñ = 1-3)与缺电子,并导致直链烯烃取代的苯基膦氧化物中性烯烃,同时用在电子富含烯烃的反应离子液体溶剂导致乙酰基变体的形成。在正常的铃木偶合条件下,相同的溴代苯基膦氧化物也与芳基硼酸反应,从而以优异的收率提供芳基化的苯基膦氧化物。还显示通过钯催化的溴化苯基膦氧化物的胺化和甲氧基羰基化是可行的。鉴于游离膦可以很容易地从氧化膦中衍生出来,钯催化的OPR 3-偶联n(C 6 H 4 Br) n(R =烷基,芳基)应该为官能化的膦配体提供一种简单而通用的途径。