An air and water insensitive visiblelightinduced hydrophosphinylation of unactivated alkenes is reported. A small amount of a simple and cheap compound, salicylaldehyde, is used as a photosensitizer. The reaction is carried out in a basic aqueous solution which enables the deprotonated salicylaldehyde to show visiblelight absorption.
Radical addition to vinylphosphine oxides: 1,2-stereoinduction of phosphorus stercogcnic centre
作者:Alberto Brandi、Stefano Cicchi、Andrea Goti、K. Michal Pietrusiewiez
DOI:10.1016/s0040-4039(00)79740-1
日期:1991.7
AIBN havebeentrapped by diphenylvinylphosphine oxide 2 giving the addition products 6–8 in high yields. Free radical addition to 2 employing the Barton methodology gave lower yields. The use of chiral (racemic:) vinylphosphine oxides allowed a stereoselective radical addition with a diastercomeric ratio as high as 9:1 for mesitylmethylvinylphosphine oxide 1.
Al<sup>3+</sup> Dopants Induced Mg<sup>2+</sup> Vacancies Stabilizing Single-Atom Cu Catalyst for Efficient Free-Radical Hydrophosphinylation of Alkenes