Convenient Synthesis of 2,7-Disubstituted 5<i>H</i>-1,3,4-Thiadiazolo[3,2-<i>a</i>]pyrimidin-5-ones and Related Compounds
作者:Tadakazu Tsuji、Keiko Takenaka
DOI:10.1246/bcsj.55.637
日期:1982.2
2,7-Disubstituted 5H-1,3,4-thiadiazolo[3,-2-a]pyrimidin-5-ones were synthesized from the reaction of 3-amino-6-methyl-2-thiouracil with carboxylic acid or from that of thiosemicarbazide with carboxylic acid and β-keto ester in the presence of phosphorus pentaoxide and methanesulfonic acid. The synthesis of related compounds is also described.
2,7-二取代的5H-1,3,4-噻二唑并[3,-2-a]嘧啶-5-酮由3-氨基-6-甲基-2-硫尿嘧啶与羧酸反应合成在五氧化二磷和甲磺酸存在下氨基硫脲与羧酸和β-酮酯的反应。还描述了相关化合物的合成。