for the cobalt-catalyzed hydroxyperfluoroalkylation of alkenes has been developed. This method demonstrated broad substrate scope, good yields, and mild conditions with the tolerance of mono-, di-, and trisubstituted alkenes including both styrenes and non-activated aliphatic olefins. This strategy offered a valuable solution for rapid and efficient construction of β-perfluoroalkyl alcohols using widely
Pyrolysis of branched-chain perfluoroalkanes in the presence of halogens
作者:Claudio Tonelli、Vito Tortelli
DOI:10.1016/0022-1139(93)02945-b
日期:1994.5
perfluoroalkanes in the presence of molecular halogens (Cl2, Br2, I2) has been studied. The clear-cut cleavage of the most hindered carbon-carbonbond and the trapping by halogens of the intermediate radicals so formed account for the product distribution. Kinetic measurements support a mechanism based on homolytic rupture of the perfluoroalkanes as the rate-determining step, followed by the fast reaction
alcohols in moderate to good yields. This photocatalyst-free protocol shows broad substrate scope under mild conditions. Moreover, mechanistic studies revealed that a newly identified electrondonor–acceptorcomplex is crucial to this transformation.
Organo-photoredox-Catalyzed Atom-Transfer Radical Substitution of Alkenes with α-Carbonyl Alkyl Halides
作者:Goki Hirata、Taisei Shimada、Takashi Nishikata
DOI:10.1021/acs.orglett.0c03359
日期:2020.11.20
(ATRS) and carboesterification reaction of alkenes with alkyl halides has been developed using PTH as the organo-photoredox catalyst. Two types of products were obtained, depending on the additive and solvent used during the reaction. Primary, secondary, and tertiary alkyl halides reacted to give the ATRS products. This protocol has several advantages: it requires mild reaction conditions and a low catalyst