<i>N</i>-Halogen Compounds of Cyanamide Derivatives. VI. The Preparation and Reaction of 2-Carbonimidoyl-3-imino-<i>Δ</i><sup>4</sup>-1,2,4-thiadiazolines
作者:Toshio Fuchigami、Keijiro Odo
DOI:10.1246/bcsj.49.3165
日期:1976.11
The reactions of potassium methyl cyanoiminodithiocarbonate (I), potassium methoxy and ethoxythiocarbonylcyanamide (IIa and IIb) with N-chloroamidines in various solvents were investigated. Δ4,2,4-Thiadiazolines (TDZ), IIIa–d, were obtained from I in good yields, whereas the 1,3,5-triazines obtained as by-products in addition to TDZ were formed from II and N-chlorobenzamidine (NCB) in chloroform and
研究了甲基氰基亚氨基二硫代碳酸钾 (I)、甲氧基钾和乙氧基硫代羰基氰胺 (IIa 和 IIb) 与 N-氯脒在各种溶剂中的反应。Δ4,2,4-噻二唑啉 (TDZ), IIIa–d 以良好的产率从 I 中获得,而作为副产物除了 TDZ 之外获得的 1,3,5-三嗪是由 II 和 N-氯苯甲脒形成的( NCB) 在氯仿和二氯甲烷中。在后一反应中,脱硫完全发生,在偶极溶剂中得到 1,3,5-三嗪和/或 1,3,5-三嗪的链中间体。TDZ 很容易被硫化氢在 N-S 连接处裂开并再循环成 1,3,5-三嗪。通过碱水解,TDZ 转化为 2-amino-1,3,5-triazin-4-ols。