2-Alkyl-4-amino-5-(tert-butyl-NNO-azoxy)-2H-1,2,3-triazole 1-oxides: synthesis and reduction
作者:V. P. Zelenov、A. A. Voronin、A. M. Churakov、Yu. A. Strelenko、V. A. Tartakovsky
DOI:10.1007/s11172-014-0405-1
日期:2014.1
A new approach to the synthesis of 4-amino-5-(tert-butyl-NNO-azoxy)-2-R-2H-1,2,3-triazole 1-oxides 1 was developed. Compounds 1 were obtained by reactions of 3-amino-4-(tert-butyl-NNO-azoxy)furoxan with aliphatic amines RNH2 (R = Me, Et, Pri, Bu, and But). 4-Amino-5-(tert-butyl-NNO-azoxy)-2-tert-butyl-2H-1,2,3-triazole 1-oxide was transformed under the action of acids into 4-amino-5-(tert-butyl-NNO-azoxy)-1-hydroxy-1H-1,2,3-triazole. Methylation of the latter with diazomethane mainly involves the O atom of the triazole oxide ring. Reduction of compounds 1 gave 4-amino-5-(tert-butyl-NNO-azoxy)-2-R-2H-1,2,3-triazoles and 4-amino-5-(tert-butyldiazenyl)-2-R-2H-1,2,3-triazoles (R = Me, Pri, and But). The structures of the compounds obtained were confirmed by 1H, 13C, and 14N NMR spectroscopy.
我们开发了一种合成 4-氨基-5-(叔丁基-NNO-氮氧基)-2-R-2H-1,2,3-三唑 1-氧化物 1 的新方法。化合物 1 由 3-氨基-4-(叔丁基-NNO-氮氧基)呋喃与脂肪族胺 RNH2(R = Me、Et、Pri、Bu 和 But)反应得到。在酸的作用下,4-氨基-5-(叔丁基-NNO-氮氧基)-2-叔丁基-2H-1,2,3-三唑 1-氧化物转化为 4-氨基-5-(叔丁基-NNO-氮氧基)-1-羟基-1H-1,2,3-三唑。后者与重氮甲烷的甲基化主要涉及三唑氧化环的 O 原子。还原化合物 1 得到了 4-氨基-5-(叔丁基-NNO-氮氧基)-2-R-2H-1,2,3-三唑和 4-氨基-5-(叔丁基二氮)-2-R-2H-1,2,3-三唑(R = Me、Pri 和 But)。所获化合物的结构通过 1H、13C 和 14N NMR 光谱得到了证实。