Phosphazene base P2-Et mediated isomerization of vinyl sulfones to allyl sulfones
作者:Zhendong Jin、Seong Heon Kim、P.L. Fuchs
DOI:10.1016/0040-4039(96)01110-0
日期:1996.7
Treatment of vinylsulfones with 0.1–0.2 eq of Phosphazene base, P2-Et in THF at 25°C affords the corresponding allyl sulfones in high yield. P2-Et has shown clear superiority to both DBU and KO-t-Bu in these reactions.
π-Allylic Sulfonylation in Water with Amphiphilic Resin-Supported Palladium-Phosphine Complexes
作者:Yasuhiro Uozumi、Toshimasa Suzuka
DOI:10.1055/s-2008-1067096
日期:——
with an amphiphilic polystyrene-poly(ethylene glycol) (PS-PEG) resin-supported phosphine-palladium complex in water as a single reaction medium under heterogeneous conditions to give allyl sulfones in good to high yields. Catalyticasymmetricallylic substitution of cycloalkenyl esters also took place in water using a PS-PEG resin-supported chiral imidazo-indolephosphine-palladium complex to give cycloalkenyl
用两亲性聚苯乙烯-聚(乙二醇)(PS-PEG)树脂负载的膦-钯配合物在水中作为单一反应介质在非均相条件下进行烯丙基酯与芳基亚磺酸钠的 π-烯丙基取代,得到良好的烯丙基砜到高产。环烯基酯的催化不对称烯丙基取代也在水中使用 PS-PEG树脂负载的手性咪唑-吲哚膦-钯络合物进行,得到高达 81% ee 的环烯基砜。
SELLEN, M.;BACKVAL, J. -E.;HELQUIST, P., J. ORG. CHEM., 56,(1991) N, C. 835-839
作者:SELLEN, M.、BACKVAL, J. -E.、HELQUIST, P.
DOI:——
日期:——
Andersson Pher G., Nilsson Ylva I. M., Baeckvall Jan-E., Tetrahedron, 50 (1994) N 2, S 559-572
作者:Andersson Pher G., Nilsson Ylva I. M., Baeckvall Jan-E.