This invention relates to the synthesis of N-(monosubstituted)dithiooxamides by the transamination of dithiooxamide. Preferred methods, according to the present invention, take advantage of the discovery that yields of N-(monosubstituted)dithiooxamides can be improved in the Wallach Reaction by: controlling the temperature of the reaction mixture; optimizing the initial concentration of the reactants; adding an effective amount of acid in the quenching or processing procedure; and/or, optionally, adding an effective amount of certain nitrogen bases to the reaction mixture.
本发明涉及通过二
硫代草酰
氨的反式合成 N-(单取代)二
硫代草酰
氨。根据本发明,优选的方法利用了以下发现:通过控制反应混合物的温度;优化反应物的初始浓度;在淬火或处理过程中加入有效量的酸;和/或,选择性地在反应混合物中加入有效量的某些氮碱,可以提高瓦拉几反应中 N-(单取代)二
硫代恶酰胺的产量。