The synthesis of monofluoroalkenes using an SN2′ reaction of lithiumamides derived from aromatic amines or lithium thiolates with 3,3-difluoropropenes is reported. This transformation features the use of fluoride as a leaving group.
Copper-catalyzed amination of alkenes and ketones by phenylhydroxylamine
作者:Chi-Ming Ho、Tai-Chu Lau
DOI:10.1039/b004286m
日期:——
alkenes using phenylhydroxylamine as the nitrogen fragment donor has been investigated. The best catalyst is CuCl2·2H2O, which produces moderate yields of allylamines with high regioselectivity resulting from double bond transposition. A mechanism similar to that for the molybdenum and the FePc systems is proposed. The first step in the catalytic cycle is the formation of nitrosobenzene from the oxidation
The transition-metal-catalyzed allylic amination of alkenes is studied. A screening of different transition-metal complexes reveals that iron complexes, especially iron phthalocyanin, have the best catalytic properties, using phenylhydroxylamine as the nitrogen-fragment donor. The iron phthalocyanin-catalyzed reaction has been studied for a variety of alkenes and the best yields are obtained for alkenes substituted with aromatic groups. The scope of this reaction is discussed.
Cu(I)-catalyzed allylic amination of olefins
作者:Gregg A Hogan、August A Gallo、Kenneth M Nicholas、Radhey S Srivastava
DOI:10.1016/s0040-4039(02)02441-3
日期:2002.12
The copper(I) complex [Cu(CH3CN)4]PF6 catalyzes the allylic amination of alkenes by aryl hydroxylamine in fair to moderate yields. Unsymmetrical alkenes react with high regioselectivity with N-functionalization occuring at the less substituted vinylic carbon. Trapping experiments indicate that free PhNO is not an intermediate in these reactions.