aliphatic amines with the reagent H2S-CH2O (2:3) in aqueous medium mainly gave substituted dithiazines; oxathiazines and dioxazines were obtained from butylamine and ethanolamine. Under the chosen reaction conditions, ethylenediamine was converted into 5-[2-(perhydro-1,3,5-dithiazin-5-yl)ethyl]perhydro-1,3,5-dithiazine or substituted thiazetidine and oxazetidine, depending on the order of mixing of
在
水性介质中用试剂
H2S-
CH2O (2:3) 对脂肪族
伯胺进行环
硫甲基化,主要得到取代的二
噻嗪;恶
噻嗪和二恶嗪由
丁胺和
乙醇胺得到。在选定的反应条件下,
乙二胺转化为 5-[2-(perhydro-1,3,5-dithiazin-5-yl)ethyl]perhydro-1,3,5-dithiazine 或取代的
噻唑烷和氧氮杂
环丁烷,具体取决于起始试剂的混合顺序。