Base-Catalyzed Stereoselective Vinylation of Ketones with Arylacetylenes: A New C(sp3)C(sp2) Bond-Forming Reaction
作者:Boris A. Trofimov、Elena Yu. Schmidt、Igor' A. Ushakov、Nadezhda V. Zorina、Elena V. Skital'tseva、Nadezhda I. Protsuk、Al'bina I. Mikhaleva
DOI:10.1002/chem.201000227
日期:——
those with condensed aromatic moieties, are readily vinylated with arylacetylenes (KOH/DMSO, 100 °C, 1 h) to give regio‐ and stereoselectively the (E)‐β‐γ‐ethylenic ketones ((E)‐3‐buten‐1‐ones) in 61–84 % yields and with approximately 100 % stereoselectivity. This vinylation represents a newC(sp3)C(sp2) bond‐forming reaction of high synthetic potential.
Metal‐Free Photochemical Olefin Isomerization of Unsaturated Ketones via 1,5‐Hydrogen Atom Transfer
作者:Rajendran Manikandan、Ravindra S. Phatake、N. Gabriel Lemcoff
DOI:10.1002/chem.202200634
日期:2022.5.19
Bring on the Light: An efficient photochemical metal/catalyst-free system has been uncovered for the selective one-bond olefin migration of unsaturated ketones. Diverse substrate scope, functional group tolerance and its application for dehomologation and one-carbon selective olefin migration processes in linear alkenes highlights the usefulness of this method.