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.
Radical polymerization of styrene derivatives bearing N-free amino acid side chains, synergic effect of chirality, and hydrogen bonding for stereoselective polymerization
Radicalpolymerization of styrenederivatives having a series of aminoacid, alanine, glycine, leucine, valine, Boc‐leucine, and Boc‐valine, in the sidechain bound at the C‐terminal was conducted to regulate the stereoinduction system in the propagation step. Isotacticity increased in the polymer main chain, especially in the polymerization of monomers bearing N‐free L‐leucyl and L‐valyl esters in