Syntheses and reactions of N-aminothiouracils and thiadiazolo[3,2-.ALPHA.]pyrimidinones.
作者:TADAKAZU TSUJI、YOSHIMI OTSUKA
DOI:10.1248/cpb.26.2765
日期:——
3-Amino-6-methyluracil and its thio analogs were synthesized. From these thio analogs, 7-methyl-5H-1, 3, 4-thiadiazolo [3, 2-α] pyrimidin-5-one, its 2-amino and 2- or 5-thio derivatives were prepared. Reflux of thiadiazolopyrimidines with chloroacetic acid or hydrochloric acid led to the ring opening of the thiadiazole moiety to give unexpected 3-amino-6-methyluracil.
合成了 3-氨基-6-甲基尿嘧啶及其硫代类似物。从这些硫代类似物中,制备出了 7-甲基-5H-1, 3, 4-噻二唑并[3, 2-α] 嘧啶-5-酮及其 2-氨基和 2-或 5-硫代衍生物。噻二唑并嘧啶与氯乙酸或盐酸回流,导致噻二唑分子开环,得到意想不到的 3-氨基-6-甲基尿嘧啶。