Fragment Coupling and the Construction of Quaternary Carbons Using Tertiary Radicals Generated From<i>tert</i>-Alkyl<i>N</i>-Phthalimidoyl Oxalates By Visible-Light Photocatalysis
作者:Gregory L. Lackner、Kyle W. Quasdorf、Gerald Pratsch、Larry E. Overman
DOI:10.1021/acs.joc.5b00794
日期:2015.6.19
visible-light, catalytic Ru(bpy)3(PF6)2, and a reductant fragments to form the corresponding tertiary carbonradical. In addition to reductive coupling with alkenes, substitutionreactions of tertiary radicals with allylic and vinylic halides is described. A mechanism for the generation of tertiary carbonradicals from tert-alkyl N-phthalimidoyl oxalates is proposed that is based on earlier pioneering investigations
The reductive ring opening of epoxides is a powerful transformation to convert readily accessible epoxides into a diverse array of valuable alcohols, including pharmaceuticals, agrochemicals, and functional polymers. Although significant progress has been made, the established methods were limited to titanocene-catalyzed reactions. Herein, we report an unprecedented zirconocene-catalyzed ring opening
FREEMAN, PETER K.;TAFESH, AHMED M.;CLAPP, GARY E., J. ORG. CHEM., 54,(1989) N, C. 782-789
作者:FREEMAN, PETER K.、TAFESH, AHMED M.、CLAPP, GARY E.
DOI:——
日期:——
Direct Construction of Quaternary Carbons from Tertiary Alcohols via Photoredox-Catalyzed Fragmentation of <i>tert</i>-Alkyl <i>N</i>-Phthalimidoyl Oxalates
作者:Gregory L. Lackner、Kyle W. Quasdorf、Larry E. Overman
DOI:10.1021/ja408971t
日期:2013.10.16
A convenientmethod for the direct construction of quaternary carbons from tertiary alcohols by visible-light photoredox coupling of tert-alkyl N-phthalimidoyl oxalate intermediates with electron-deficient alkenes is reported.