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Report | Regular issue | Vol 16, No. 7, 1981, pp.1179-1185
Published online, 1st January, 1970
DOI: 10.3987/R-1981-07-1179
Syntheses and Reactions of Silylated Diaminosulfanes

Richard Neidlein* and Werner Lehr

*Pharmazeutisch-Chemishces Institut, Universität Heidelberg, Im Neuenheimer Feld 364, 69120 Heidelberg, Germany


The synthesis of unsymmetrically substituted silylated diaminosulfanes 3a - 3e with different alkylgroups at both nitrogen atoms are described; the reactions of 3a, 3b with oxalyl chloride yields the unsymmetrically substituted 2,5-dialkyl-1,2,5-thiadiazolidine-3,4-diones 5a, 5b in moderate yields; 5a, 5b were oxidized to the S-oxides 6a, 6b by H2O2. The reactions of 3c, 3d with oxalyl chloride lead to a mixture of reaction - products - S8, oxalic acid-amides 7, 8 and a corresponding ester 9b.