secondary aliphatic amines with tetramethylthiuramdisulfide in various solvents at different temperatures was studied. At 110°C, the reactions with primary amines afforded mixed,N,N-dimethyl-N′-alkyl(cycloalkyl)thioureas and symmetricalN,N′-dialkyl(cycloalkyl)thioureas as the final products, while the reactions with secondary amines gave mixtures of dithiocarbamate salts with “symmetrical” derivatives
into the final products occur,viz., (1) the reactions of CS2 with primaryamines on heating (70–110 °C) yield mixed and symmetrical thioureas and the reactions of CS2 with secondaryamines give symmetrical dithiocarbamates, and (2) insertion of CS2 intoS-(thiocarbamoyl)thiohydroxylamines affords thiuram disulfides. Thiuram disulfides formed from primaryamines decompose to give isothiocyanates, which
Insertion of Arynes into Thioureas: A New Amidine Synthesis
作者:Kallolmay Biswas、Michael F. Greaney
DOI:10.1021/ol202049v
日期:2011.9.16
thioureas via a formal π-insertion into the C═S bond. The reaction contrasts with that of ureas, which proceeds via benzyne σ-insertion into the C–N bond, and represents a new, operationally simple route to functionalized amidines.
Reaction of 1,4,2-Dithiazolium Salts with Amino Compounds
作者:Katsumi Yonemoto、Isao Shibuya
DOI:10.1246/bcsj.61.4043
日期:1988.11
Systematic studies on the behavior of 1,4,2-dithiazolium cations (1) toward various amino compounds (ammonia, aliphatic and aromatic amines, hydrazine, semicarbazide, thiosemicarbazide derivatives, etc.) were performed. The reaction pathway could be classified into three types depending on possible three fission modes of the initially-formed adduct. The main products were 5-imino-1,4,2-dithiazole,
A convenient method for the synthesis of substituted thioureas
作者:Mahagundappa Maddani、Kandikere Ramaiah Prabhu
DOI:10.1016/j.tetlet.2007.07.212
日期:2007.10
synthesis of substituted thioureas by the reaction of primary amines with molybdenum dialkyl dithiocarbamates has been developed. Primary amines on reaction with 0.5 equiv of molybdenum xanthate produce the corresponding thioureas in moderate to good yields in short times. Similar reactions with propargylamine or 2-aminoethanol produce cyclic thiaoxazolidine and oxazolidine derivatives, respectively.