Copper-Catalyzed anti-Hydrophosphination Reaction of 1-Alkynylphosphines with Diphenylphosphine Providing (<i>Z</i>)-1,2-Diphosphino-1-alkenes
作者:Azusa Kondoh、Hideki Yorimitsu、Koichiro Oshima
DOI:10.1021/ja070048d
日期:2007.4.1
nes and their sulfides. The reaction is highly chemoselective and can be performed even in an aqueous medium. The reaction is reliable enough to realize a gram-scale synthesis of (Z)-1,2-diphosphino-1-alkene. Radical reduction of the diphosphine disulfides with tris(trimethylsilyl)silane yields the parent trivalent diphosphines without suffering from the isomerization of the olefinic geometry. Enantioselective
1-炔基膦与二苯基膦的氢膦化反应在铜催化下以反方式进行,为获得各种 (Z)-1,2-二膦基-1-烯烃及其硫化物提供了一种简单有效的途径。该反应具有高度化学选择性,甚至可以在水性介质中进行。该反应足够可靠,可以实现 (Z)-1,2-diphosphino-1- 烯烃的克级合成。用三(三甲基甲硅烷基)硅烷对二硫化二膦进行自由基还原产生母体三价二膦,而不会发生烯烃几何异构化。(Z)-3,3-二甲基-1,2-双(二苯基硫代膦基)-1-丁烯的对映选择性氢化,然后脱硫产生新的手性双齿膦配体。