Radical Additions of Alkyl 2-Haloalkanoates and 2-Haloalkanenitriles to Alkenes Initiated by Electron Transfer from Copper in Solvent-Free Systems
作者:Jürgen O. Metzger、Ralf Mahler、Gerald Francke
DOI:10.1002/jlac.199719971119
日期:1997.11
Alkyl 2-iodoalkanoates 2, and 2-iodoalkanenitriles 15 were added, with copper powder, to the 1-alkenes 1a, e, f, and h, and to the alkenes 1b, c, d, and g with a 1,2-dialkyl substituted double bond, to give, respectively, γ-lactones and 4-iodoalkanenitriles in very good yields. No solvent was used. The reaction is a free radical addition initiated by electrontransferfrom copper to the activated iodoalkane
Intermolecular Photocatalytic C–H Functionalization of Electron-Rich Heterocycles with Tertiary Alkyl Halides
作者:Corey Stephenson、Elizabeth Swift、Theresa Williams
DOI:10.1055/s-0035-1561320
日期:——
The coupling of tertiary alkyl halides with electron-rich arenes is promoted by visible-light photoredox catalysis. Tris[2-phenylpyridinato-C 2,N]iridium(III) [Ir(ppy)3] was the optimal catalyst, enabling direct reduction of the halide from the excited state, and thereby eliminating the requirement for a stoichiometric electron donor. High yields were obtained when the aromatic component was used in