5-Cyanomethyl-2-thioxo-4-aminothiazolines (II) were prepared by the addition reaction of dithiocarbamates to fumaronitrile. In the reactions of bis (methylthio) maleonitrile (IXa), bis (benzylthio) maleonitrile (IXb), 2, 3-dicyano-5, 6-dihydro-1, 4-dithiin (IXc) and 4, 5-dicyano-2-oxo-1, 4-dithiole (IXd) with dithiocarbamates were obtained 5, 5'-bi-2-thioxo-4-aminothiazolines (X). The 4-amino groups of II and X were found to be labile and were hydrolyzed when heated with mineral acids to give 5-cyanomethyl-2-thioxo-4-thiazolidones (III) and 5, 5'-bi-2-thioxo-4-thiazolidones (XII), respectively. X was also found to be converted to Δ5, 5'-bi-2-thioxo-4-iminothiazolidine (XI) by autoxidation in the presence of catalytic amount of triethylamine. 4-Oxo-4'-imino-Δ5, 5'-bi-2-thioxo-thiazolidine (XVI) was prepared by the addition reaction of N-benzyldithiocarbamate to 5-cyanomethylidene-2-thioxo-4-thiazolidone (XIV). XI and XIV gave Δ5, 5'-bi-2-thioxo-4-thiazolidones (XIII) on hydrolysis with mineral acids.
5-
氰甲基-2-
硫酮-4-
氨基
硫氮茂 (II) 可用富马睛与二
硫代
氨基甲酸盐的加成反应来制备。用二
硫代
氨基甲酸盐与双 (甲
硫基) 马来睛 (IXa),双 (苄
硫基) 马来睛 (IXb),2,3-二
氰基-5,6-二氢-1,4-二
硫茂 (IXc)及4,5-二
氰基-2-氧-1,4-二
硫茂 (IXd) 反应,制得了 5,5'-双-2-
硫酮-4-
氨基
硫氮茂 (X)。发现 II 及 X 的 4-
氨基对酸不稳定,与
无机酸加热时,即
水解而得 5-
氰甲基-2-
硫酮-4-
硫氮杂茂酮 (III) 及 5,5'-双-2-
硫酮-4-
硫氮杂茂酮 (XII)。发现 X 于催化量的
三乙胺存在时可自动氧化成 Δ 5,5'-双-2-
硫酮-4-亚
氨基
硫氮茂 (XI)。由 N-苄基二
硫代
氨基甲酸盐与5-亚
氰甲基-2-
硫酮-4-
硫氮杂茂酮 (XIV) 的加成反应制得了 4-氧-4,亚
氨基-Δ5,5'-双-2-
硫酮-
硫氮杂茂酮 (XVI)。用
无机酸水解 XI 及 XIV,制得了 Δ5,5'-双-2-
硫酮-4-
硫氮杂茂酮 (XIII)。