Lewis base-catalyzed double nucleophilic substitution reaction of N -tosylaziridinofullerene with thioureas or guanidines
作者:Qi Meng、Jun-Yu Cheng、Chun-Bao Miao、Xiao-Qiang Sun、Hai-Tao Yang
DOI:10.1016/j.tetlet.2017.05.048
日期:2017.6
double nucleophilic substitution reaction of N-tosylaziridinofullerene with thioureas or guanidines affords the fullerothiazolidin-2-imine or fulleroimidazolidin-2-imine derivatives, respectively. In the case of unsymmetrical thioureas connecting an alkyl and an aryl group on each of the nitrogen atom, the transformation exhibits excellent chemoselectivity with only the aryl substituted nitrogen atom bonding
Lewis碱催化的N-甲苯磺酰基叠氮富勒烯与硫脲或胍的双亲核取代反应分别得到了Fullerothiazolidin-2-imine或fulleroimidazolidin-2-imine衍生物。在每个氮原子上连接烷基和芳基的不对称硫脲的情况下,仅芳基取代的氮原子键合至C 60上,该转化表现出优异的化学选择性。生成的三-4-甲氧基苯基取代的全咪唑啉-2-亚胺与CS 2平滑反应,生成二-4-甲氧基苯基的全咪唑啉-2-硫酮。