Inter- and Intramolecular Radical Couplings of Ene-ynes or Halo-alkenes Promoted by an InCl<sub>3</sub>/MeONa/Ph<sub>2</sub>SiH<sub>2</sub> System
作者:Naoki Hayashi、Ikuya Shibata、Akio Baba
DOI:10.1021/ol051114o
日期:2005.7.1
(HInCl(2)) under nonacidic conditions is achieved by transmetalation between Ph(2)SiH(2) and InCl(2)OMe. The presented system achieves the titled coupling reactions in a radical manner. In particular, the nonacidic character enables the applications to acid-sensitive inter- and intramolecular ene-yne couplings.
Reactions of cycloalkyl chlorides and bromides with diphenylphosphide ions in liquid ammonia
作者:M�nica A. Nazareno、Sara M. Palacios、Roberto A. Rossi
DOI:10.1002/poc.610060707
日期:1993.7
The reactions of cycloalkyl (butyl, pentyl, hexyl and heptyl) chlorides and bromides with diphenylphosphide ions were studied in liquid ammonia. Cyclobutyl chloride was unreactive, whereas the bromide reacted giving the substitution product cyclobutyldiphenylphosphine (isolated as the oxide) in good yields; this reaction was catalysed by light and partially inhibited by p-dinitrobenzene (p-DNB). Cyclopentyl
Nickel-Catalyzed Reductive Cross-Coupling of Unactivated Alkyl Halides
作者:Xiaolong Yu、Tao Yang、Shulin Wang、Hailiang Xu、Hegui Gong
DOI:10.1021/ol200617f
日期:2011.4.15
Ni-catalyzed reductive approach to the cross-coupling of two unactivated alkyl halides has been successfully developed. The reaction works efficiently for primary and secondary halides, with at least one being bromide. The mildreaction conditions allow for excellent functional group tolerance and provide the C(sp3)−C(sp3) coupling products in moderate to excellent yields.
Indium hydride: a novel radical initiator in the reduction of organic halides with tributyltin hydride
作者:Katsuyuki Inoue、Akemi Sawada、Ikuya Shibata、Akio Baba
DOI:10.1016/s0040-4039(01)00816-4
日期:2001.7
Dichloroindium hydride (Cl2InH), which was generated in situ by transmetallation between tributyltinhydride and indium trichloride, acted as a novel radical initiator for the reduction of organic halides with tributyltinhydride. The reaction was revealed to proceed through a radical process under non-oxygen conditions at room temperature, and to be applicable to intramolecular radical cyclizations
Design, synthesis, application and recovery of a minimally fluorous diaryl diselenide for the catalysis of stannane-mediated radical chain reactions
作者:David Crich、Xiaolin Hao、Mathew Lucas
DOI:10.1016/s0040-4020(99)00902-3
日期:1999.12
diselenide is described. On reduction in situ with tributylstannane this diselenide provides a fluorous selenol which is effective in inhibiting a range of stannane-mediated radicalrearrangements, including a cyclopropylcarbinyl ring opening. A method for the recovery of the fluorous diselenide involving continuous extraction in a modified, cooled continuous extractor is described.