A transition-metal-free & diazo-free styrene cyclopropanation
作者:Ana G. Herraiz、Marcos G. Suero
DOI:10.1039/c9sc02749a
日期:——
An operationally simple and broadly applicable novel cyclopropanation of styrenes using gem-diiodomethyl carbonyl reagents has been developed. Visible-light triggered the photoinduced generation of iodomethyl carbonyl radicals, able to cyclopropanate a wide array of styrenes with excellent chemoselectivity and functional group tolerance. To highlight the utility of our photocyclopropanation, we demonstrated
Organic photoredox-catalyzed alkylamination of olefins is performed with alkyl halides and nitrile solvent by blocking the traditional photoredox-ATRA process with Zn(OAc)2. A range of carbon-centered radicals (α-alkylcarbonyl, benzyl, cyanomethyl) are effectively participating in this strategy giving rise to versatile carboamination products with high synthetic value.
substoichiometric amounts of electrons, introduced electrochemically. This protocol enables access to a variety of nitro-derived molecules from unsaturated hydrocarbons including alkenes, alkynes, and arenes, in addition to promoting ipso-nitration reactions and nitrative cyclizations with high levels of chemo- and regioselectivity.