Dirhodium(II)-Mediated Alkene Epoxidation with Iodine(III) Oxidants
作者:Ali Nasrallah、Gwendal Grelier、Maria Ivana Lapuh、Fernando J. Duran、Benjamin Darses、Philippe Dauban
DOI:10.1002/ejoc.201800306
日期:2018.11.15
combination of the dirhodium(II) complex Rh2(tpa)4 (tpa = triphenylacetate) with the iodine(III) oxidant PhI(OPiv)2 is shown to promote the epoxidation of alkenes in the presence of 2 equivalents of water. The reaction can be applied to diversely substituted alkenes and the corresponding epoxides are isolated with yields of up to 90 %. A possible mechanism involves the dirhodium(II) complex as a Lewis
Dirhodium (II) 络合物和碘 (III) 氧化剂已在合成氮烯化学中找到有用的应用。在这项研究中,二铑(II)配合物 Rh2(tpa)4(tpa = 三苯乙酸盐)与碘(III)氧化剂 PhI(OPiv)2 的组合被证明在 2 当量的水。该反应可应用于不同取代的烯烃,并以高达 90% 的产率分离相应的环氧化物。一种可能的机制涉及二铑 (II) 络合物作为路易斯酸物质,它可以调节碘 (III) 试剂的氧化特性。
Substituent-directed alkyl addition reactions of epoxides. 1. Applications to the synthesis of 3-hydroxy-4-methylalkanoic acids
作者:Lee A. Flippin、Peter A. Brown、Keyvan Jalali-Araghi