Synthesis of a New Family of 1,1-Diazidoethenes: One-Pot Construction of 4-Azido-1,2,3-triazoles via Nitrene Cyclization
作者:Alexey V. Shastin、Biligma D. Tsyrenova、Pavel G. Sergeev、Vitaly A. Roznyatovsky、Ivan V. Smolyar、Victor N. Khrustalev、Valentine G. Nenajdenko
DOI:10.1021/acs.orglett.8b03227
日期:2018.12.21
sodium azide has been studied and found to provide straightforward access to extremely rare 1,1-bisazides. It was demonstrated that these highly unstable compounds are prone to eliminate the N2 molecule to cyclize into 4-azido-1,2,3-triazoles bearing two aryl (heteroaryl) groups at positions 2 and 5. The formation of bisazides was confirmed by their trapping with cyclooctyne and B3LYP calculations. Most
已经研究了4,4-二氯-1,2-二氮杂丁-1,3-二烯与叠氮化钠的反应,发现该反应可直接获得极为罕见的1,1-双叠氮化物。结果表明,这些高度不稳定的化合物易于消除N 2。分子环化为在位置2和5带有两个芳基(杂芳基)的4-叠氮基1,2,3-三唑。通过用环辛炔和B3LYP计算捕获双叠氮化物,证实了双叠氮化物的形成。最有可能的是,氮杂基团通过类嵌合体的参与促进了氮的消除以形成中间的氮烯。发现该反应对于各种4-叠氮基三唑的高效合成非常普遍。已证明这些杂环是随后制备1,2,3-三唑衍生的化合物的极具吸引力的构建基。