1,4-二氢-1,4-环氧萘 、
4-[C-methyl-N-(pyridin-2-ylamino)carbonimidoyl]benzonitrile 在
cobalt(II) diacetate tetrahydrate 、 2-bromo-6-((R)-4-((S)-1-(tert-butoxy)ethyl)-4,5-dihydrooxazol-2-yl)phenol 作用下,
以
乙腈 为溶剂,
以85 %的产率得到(4bR,5S,10R,10aS,11R)-11-methyl-11-((E)-pyridin-2-yldiazenyl)-4b,10,10a,11-tetrahydro-5H-5,10-epoxybenzo[b]fluorene-3-carbonitrile