Elemental white phosphorus as a radical trap: a new and general route to phosphonic acids
White phosphorus is a very efficient trap for carbon radicals generated by white light photolysis of Barton PTOC esters using CH2Cl2-CS2 as solvent at 0 Deg under dry argon. Removal of the solvent mixt. and oxidn. with H2O2 in 1,2-dimethoxyethane provides an efficient new synthesis of phosphonic acids, where this function replaces the carboxyl in the original carboxylic acid. [on SciFinder (R)]
Organometallic and Organometalloidal Compounds
Dep. Chem.,Texas A and M Univ.,College Station,TX,USA.
written in English.
89025-67-2; 91233-19-1; 105398-69-4; 114050-31-6; 147986-70-7 Role: RCT (Reactant), RACT (Reactant or reagent) (photolysis of, in presence of white phosphorus, phosphonic acid deriv. from); 1005-23-8P; 4672-30-4P; 5137-73-5P; 23906-88-9P; 147986-71-8P Role: SPN (Synthetic preparation), PREP (Preparation) (prepn. of); 12185-10-3 (White phosphorus) Role: USES (Uses) (radical trapping by, of carbon radicals)
Record created on 2010-11-25, modified on 2016-08-08