211818-45-0Relevant articles and documents
SYNTHESIS OF DITHIOESTER CHAIN TRANSFER AGENTS
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Page/Page column 15, (2009/01/24)
This invention relates to the synthesis of dithiocarboxylic acid esters by reaction of bis(thioacyl) disulphides, thioacetals or vinylidane bis(thioether) with free-radicals (optionally in the presence of monomers). The invention also relates to processes for the synthesis of polymers utilising these dithioesters as polymerisation regulators (chain transfer agents) or to the use of bis(thioacyl) disulphides to generate dithioester chain transfer agents in situ.
A novel synthesis of functional dithioesters, dithiocarbamates, xanthates and trithiocarbonates
Thang, San H.,Chong, Bill Y.K.,Mayadunne, Roshan T.A.,Moad, Graeme,Rizzardo, Ezio
, p. 2435 - 2438 (2007/10/03)
A novel synthesis of functional dithioesters, dithiocarbamates, xanthates and trithiocarbonates is described. Heating a bis(thiocarbonyl) disulfide with an azo-compound results in the formation of (thiocarbonyl)sulfanyl derivatives in moderate to high yield. The process is proposed as the method of choice for preparing tertiary (thiocarbonyl)sulfanyl compounds and is compatible with a wide range of functionalities (e.g. carboxy, hydroxy and nitrile).