Intramolecular Cyclization of 1,2-bis(N-alkoxy-N-nitrosoamino)alkanes: A Unique Route to 4,5-Dihydro-1,2,3-triazole 2-Oxides
作者:Vadim K. Khlestkin、Dmitrii G. Mazhukin、Alexsei Ya. Tikhonov、Tatyana V. Rybalova、Irina Yu. Bagryanskaya、Yurii V. Gatilov
DOI:10.1055/s-2000-6399
日期:——
1,2-Bis(N-alkoxy-N-nitroso)amines 7 obtained by nitrosation of the corresponding 1,2-bisalkoxyamines 4 were smoothly converted into 1-alkoxy-4,5-dihydro-1,2,3-triazole 2-oxides 8 under reflux in methanol in high yields. 4H-1,2,3-Triazole 2-oxides 9, a novel type of triazole oxides, and 2-hydroxy-2H-1,2,3-triazoles 10 were obtained by the reaction of 1-alkoxy-4,5-dihydro-1,2,3-triazole 2-oxides 8 with sodium methoxide.
通过相应的 1,2- 双烷氧基胺 4 的亚硝基化反应得到的 1,2-双(N-烷氧基-N-亚硝基)胺 7 在甲醇回流条件下顺利转化为 1-烷氧基-4,5-二氢-1,2,3-三唑 2-氧化物 8,产量很高。通过 1-烷氧基-4,5-二氢-1,2,3-三唑 2-氧化物 8 与甲醇钠的反应,得到了新型三唑氧化物 4H-1,2,3-三唑 2-氧化物 9 和 2-羟基-2H-1,2,3-三唑 10。