Synthesis of 5-(aroylamino)-2-methyl-2<i>H</i>,-1,2,4-thiadiazol-3-ones by oxidative cyclization of 1-aroyl-5-methyl-2-thiobiurets
作者:Nam Sook Cho、Hyun Il Shon、Cyril Párkányi
DOI:10.1002/jhet.5570280701
日期:1991.11
5-Aroylamino-2-methyl-2H-1,2,4-thiadiazol-3-ones 3 have been synthesized by oxidative cyclization of 1-aroyl-5-methyl-2-thiobiurets 2 with hydrogen peroxide in an alkaline solution. The needed 1-aroyl-5-methyl-2-thiobiurets 2 have been obtained through the addition of methylurea to the corresponding aroyl isothiocyanates.
通过在碱性溶液中用过氧化氢对1-芳酰基-5-甲基-2-硫代缩二脲2进行氧化环化反应,已经合成了5-芳酰基氨基-2-甲基-2 H -1,2,4-噻二唑-3-酮3。通过将甲基脲加入相应的芳酰基异硫氰酸酯中,获得了所需的1-芳酰基-5-甲基-2-硫代缩二脲2。