Formation of a reasonably stabilized trichloromethyl anion by the reaction of chloroform with electrogenerated base, and its 1,4-addition to α,β-unsaturated carbonyl compounds
A reasonably stabilized trichloromethylanion (TCMA) was formed by the reaction of chloroform with an electrogenerated base prepared by the electroreduction of 2-pyrrolidone, and the addition of this TCMA to α,β-unsaturated esters gave the corresponding β-trichloromethyl esters in good yields.
Phase transfer catalyzed reactions of chloroform with electrophilic alkenes. Effect of solvent on reaction course
作者:Michakl Fedoryński
DOI:10.1016/s0040-4020(99)00209-4
日期:1999.5
Reaction of chloroform with acrylic esters 1a-g, carried out in the presence of 50% aq NaOH, benzyltriethylammonium chloride (TEBACl) as a catalyst in heptane, gives exclusively adducts of trichloromethylanion 2a-g with good yields. The same reaction carried out in the absence of solvent yields a mixture of products.