Iron-Catalyzed Decarboxylative Olefination of Unstrained Carbon–Carbon Bonds Relying on Alkoxyl Radical Induced Cascade
作者:Pin Gao、Hao Wu、Jun-Cheng Yang、Li−Na Guo
DOI:10.1021/acs.orglett.9b02675
日期:2019.9.6
An iron-catalyzed decarboxylative olefination of unstrained carbon-carbon bonds via alkoxylradical induced C-C bond cleavage is presented. This protocol features mild conditions (room temperature, redox-neutral), good substrate scope and functional group compatibility, as well as excellent stereoselectivity, thus providing a facile access to the distal alkenyl ketones.
A novel approach for the construction of α-quaternary carbon centers by an Fe(II)-catalyzed alkylation of α-alkoxy-1,3‑dicarbonyl compounds with various alkylsilyl peroxides has been developed. This strategy accommodates a broad substrate scope of 1,3‑dicarbonyl derivatives and alkylsilyl peroxides via a radical-promoted reaction pathway.
Kinetic resolution of chiral hydroperoxidesvia Sharpless Epoxidation
作者:E. H�ft、H.-J. Hamann、A. Kunath
DOI:10.1002/prac.19943360611
日期:——
The kinetic resolution of tertiary hydroperoxides via catalytic Sharpless epoxidation with various allylic alcohols has been investigated. By using 1-cyclohexyl-1-phenylethyl hydroperoxide an enantiomeric excess (e.e.) of up to 29 % of the resolved hydroperoxide has been observed at a consumption of the racemic hydroperoxide of nearly 50 %. The e.e. can be increased, however, only by raising the hydroperoxide consumption.
A PROCESS FOR THE PREPARATION OF A TERTIARY PERESTER