Thion- und Dithioester, XXIV Synthese von Tetrathiooxalestern
Reduction of carbon disulfide with potassium in dimethylformamide and subsequent alkylation yields the isotrithiones 2, which have been desulfurised with mercury acetate to give the 1,3-dithiol-2-ones 3. 2a is also available by a stepwise synthesis starting with methyl (methylthio)dithioacetate (6).The photochemical decarbonylation of 4,5-bis(methylthio)-1,3-dithiol-2-one (3a) leads to the formation of dimethyl tetrathiooxalate (11a).In solution 11a is in equilibrium with its dimer 13.Cyclic tetrathiooxalates are probably unstable at room temperature.
Hartke, Klaus,Kissel, Thomas,Quante, Josef,Matusch, Rudolf
p. 1898 - 1906
(2007/10/02)
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