Convenient Unimolecular Sources of Aryloxyl Radicals. 1. Aryloxyoxalyl Chlorides
Technical rept. no. 7, 30 Sep 1988-30 May 1989
MASSACHUSETTS UNIV AMHERST DEPT OF CHEMISTRY
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UV photolysis of readily synthesized aryloxyoxalyl chloride half- esters provides a new unimolecular source of aryloxyl radicals, as shown by ESR nd UV-vis spectroscopy. Although phenoxyl radicals have been generated and investigated for a long time, such studies have usually been carried out under solution phase bimolecular oxidative conditions, or by direct photolysis of phenols. We have recently had the occasion to desire a method for efficient unimolecular photochemical generation of phenoxyl and related aryloxyl radicals, and have found that aryloxyoxalyl chloride half-esters provide a readily available photochemical source of aryloxyl radicals. Synthesis chemistry.
- Physical Chemistry