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.
A Practical and Catalytic Reductive Olefin Coupling
作者:Julian C. Lo、Yuki Yabe、Phil S. Baran
DOI:10.1021/ja4117632
日期:2014.1.29
A redox-economic method for the direct coupling of olefins that uses an inexpensive iron catalyst and a silane reducing agent is reported. Thus, unactivated olefins can be joined directly to electron-deficient olefins in both intra- and intermolecular settings to generate hindered bicyclic systems, vicinal quaternary centers, and even cyclopropanes in good yield. The reaction is not sensitive to oxygen