In our experiments,we also found,when the length of alkyl bromide chain increased,only cyclo-calix[4]arene bearing nitrogenous group could be achieved at last.

• 实验中发现,当母体杯芳烃下沿引入的溴代烷基变长时,进一步引入含氮基团,只能得到1,3位环化的含氮杯[4]芳烃。