3,4,5,6-Tetramethyl-1,2-dehydrobenzol 、
4,9-Ditert-butyl-4,9-diazatetracyclo[10.4.0.02,6.07,11]hexadeca-1(16),2,5,7,10,12,14-heptaene 以76%的产率得到rac-(5R,10R,15S,16S)-17,18-di-tert-butyl-1,2,3,4,11,12,13,14-octamethyl-5,10,15,16-tetrahydro-5,16:10,15-diepiminobenzo[h]pentaphene