The invention of new radical chain reactions. Part VIII. Radical chemistry of thiohydroxamic esters; A new method for the generation of carbon radicals from carboxylic acids
作者:Derek H.R. Barton、David Crich、William B. Motherwell
DOI:10.1016/s0040-4020(01)97173-x
日期:1985.1
by tributylstannane in a radicalchainreaction to furnish nor-alkanes.1 In the absence of the stannane a smooth decarboxylatlive rearrangement occurs to give 2-substituted thiopyridines.1 The radicals present in this reaction provoke with -butylthiol an efficient radicalreaction with formation of nor-alkane and 2-pyridyl--butyl disulphide.1Similarly these carbon radicals can be captured by halogen
The invention of radical reactions. Part XVIII. Decarboxylative radical addition to arsenic, antimony, and bismuth phenylsulphides - a novel synthesis of nor-alcohols from carboxylic acids
作者:Derek H.R. Barton、Dominique Bridon、Samir Z. Zard
DOI:10.1016/s0040-4020(01)80092-2
日期:1989.1
Carbon centered radicals obtained by decarboxylative transformation of suitable thiohydroxamate esters react with group Va trisphenyl-sulphides to give intermediates of general formula R-M(SPh)2 (M = As, Sb, Bi). These react spontaneously with air to give the corresponding alcohols. This procedure is especially useful in the case where M=Sb. It is thus sufficient to stir the thiohydroxamate ester with
The role of organic tellurides as accumulators and exchangers of carbon radicals
作者:Derek H.R. Barton、Nubar Ozbalik、Jadab C. Sarma
DOI:10.1016/s0040-4039(00)82402-8
日期:1988.1
Primary carbon radicals, generated by photolysis of acyl derivatives of -hydroxy-2-thiopyridone, exchange efficiently on diisopropyl telluride to give isopropylradicals which can in turn be trapped by radicophilic olefins.
作者:Derek H.R. Barton、Dominique Bridon、Samir Z. Zardb
DOI:10.1016/s0040-4020(01)87707-3
日期:1987.1
Irradiation of esters 3 derived from aliphatic or alicyclic carboxylic acids and N-hydroxy-2-thiopyridone in the presence of various quinones gives high yields of the corresponding adducts (e.g. 9) with net loss of carbon dioxide.
The invention of radical reactions. Part XXVI. New thio- and seleno-hydroxamic acids; radical chemistry of their O-acyl derivatives.
作者:Derek H.R. Barton、Catherine Tachdjian
DOI:10.1016/s0040-4020(01)88250-8
日期:1992.1
New thio- and seleno-hydroxamic acids have been synthesized from various 4,4-disubstituted thiazolidine-2,5-dithiones. Their corresponding O-acyl derivatives rearrange photochemically, with visible light, in an identical manner to the acyl derivatives of N-hydroxy-2-thiopyridone. A wide range of half-lives was observed.