The thermal decomposition of N-hydroxypyridine-2-thione esters to produce radicals which can react with a variety of halogen-donating reagents resulting in an halogenative decarboxylation reaction or with H-atom donating sources to give rise to products of decarboxylation has been given the appellation, Barton decarboxylation reaction. 2 In an ancillary study the need arose to prepare chiral l-bromo-l-fluoro-2, 2- ...