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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。
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Synthesis of 2-amino-5-aryl-1,3,4-thiadiazoles and their condensed analogs with the use of aromatic nitrites
作者:S. Sh. Shukurov、M. A. Kukaniev、B. M. Bobogaribov、S. S. Sabirov
DOI:10.1007/bf00707235
日期:1995.10
Aromatic nitrites are found to readily react with thiosemicarbazide and 4-amino-3-methyl-1,2,4-triazol-5-thione in a solution of polyphosphoric acid to give corresponding 2-amino-5-aryl-1,3,4-thiadiazoles.
发现芳族
亚硝酸盐很容易与
氨基
硫脲和 4-
氨基-
3-甲基-1,2,4-三唑-5-
硫酮在多
磷酸溶液中反应,得到相应的 2-
氨基-5-芳基-1,3, 4-
噻二唑。
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Dehuri, S. N.; Pradhan, P. C.; Nayak, A., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1983, vol. <B> 22, # 8, p. 815 - 816
作者:Dehuri, S. N.、Pradhan, P. C.、Nayak, A.
DOI:——
日期:——
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KORNIS G.; MARKS P. J.; CHIDESTER C. G., J. ORG. CHEM., 1980, 45, NO 24, 4860-4863
作者:KORNIS G.、 MARKS P. J.、 CHIDESTER C. G.
DOI:——
日期:——
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TSUJI, TADAKAZU;TAKENAKA, KEIKO, BULL. CHEM. SOC. JAP., 1982, 55, N 2, 637-638
作者:TSUJI, TADAKAZU、TAKENAKA, KEIKO
DOI:——
日期:——