(R)-8-fluoro-5-[(4-methoxyphenyl)sulfonyl]-6-methyl-5,6-dihydrophenanthridine 、
环己烯 、
三溴化硼 、
二氯甲烷 在
4-[(8-fluoro-6-methylphenanthridin-5(6H)-yl)sulfonyl]phenol 、 crude product 、 silica gel 、
ethyl acetate n-hexane 作用下,
以to yield 4-{[(R)-8-fluoro-6-methylphenanthridin-5(6H)-yl]sulfonyl}phenol* as a solid (0.52 g, 73%), m.p. 193° C.的产率得到4-[(8-fluoro-6-methylphenanthridin-5(6H)-yl)sulfonyl]phenol