Alkylation of 3-tert-Butylpyrimido[4′,5′:3,4]pyrazolo[5,1-c]-[1,2,4]triazine-4,10(1H,9H)-diones and -dithiones

被引：0
|
作者：
L. M. Mironovich
S. M. Ivanov
E. D. Daeva
机构：
[1] Southwest State University,
[2] Zelinskii Institute of Organic Chemistry,undefined
来源：
Russian Journal of Organic Chemistry | 2019年 / 55卷
关键词：
pyrimido[4′,5′: 3,4]pyrazolo[5,1-; ][1,2,4]triazine; pyrazolo[5,1-; ][1,2,4]triazine; condensation; alkylation;
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学科分类号：
摘要：
The condensation of 7-amino-1-benzyl-3-tert-butyl-4-oxo-1,4-dihydropyrazolo[5,1-c][1,2,4]triazine-8-carbonitrile with formic acid afforded 1-benzyl-3-tert-butylpyrimido[4′,5′:3,4]pyrazolo[5,1-c][1,2,4]-triazine-4,10(1H,9H)-dione which was also synthesized by alkylation of 3-tert-butylpyrimido[4′,5′: 3,4]pyrazolo[5,1-c][1,2,4]triazine-4,10(1H,9H)-dione with benzyl chloride. The reactions of 1-benzyl- and 1-butyl-3-tert-butylpyrimido[4′,5′: 3,4]pyrazolo[5,1-c][1,2,4]triazine-4,10(1H,9H)-diones with butyl bromide and benzyl chloride, respectively, under harsh conditions gave substitution products at the N9 atom, the corresponding 1-benzyl-9-butyl and 9-benzyl-1-butyl derivatives. The alkylation of 3-tert-butyl pyrimido[4′,5′: 3,4]-pyrazolo[5,1-c][1,2,4]triazine-4,10(1H,9H)-dithione and its 8-methyl derivative in alkaline medium led to the formation of alkyl derivatives at the sulfur atom in the 10-position.
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页码：958 / 963
页数：5
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