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ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.

The review describes thiophilic reactions of thiocarbonyl compounds with C‐ and S‐nucleophiles. They occur more frequently than has been supposed up to now, especially between vicinal thiocarbonyl systems and S‐nucleophiles. A general relation between thiophilic reactions and the redox behaviour of the system and a possibility to estimate approximately the thiophilic properties are discussed. Some conclusions for the synthesis and the behaviour of thiocarbonyl compounds are drawn.

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Claisen Condensations with Selected Dithioesters.Synthesis of Special 3-Methylthio-acrylonitriles.-Claisen condensation of (I) with the CH-acidic derivatives (II) leads to the methylthio-acrylonitriles of type (IV) in the presence of NaH or under phase-transfer conditions. The analogues (V) are obtained similarly (yield 59-75%). With excess of (VII) (VIII) is obtained. The orange crystals of (XI) are available analogously. - (MAYER, R.; HARTENHAUER, H.; GRUNER, M.; J. Prakt. Chem. 333 (1991) 1, 35-40; Sekt. Chem., TU Dresden, O-8027 Dresden, Fed. Rep. Ger.; DE)

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