tert-butyl 8-((1-(ethoxycarbonyl)-1H-indol-5-yl)sulfonyl)-6-hydroxy-3,4-dihydrobenzofuro[3,2-c]pyridine-2(1H)-carboxylate 、
甲醚 在
SiO2 、
ethyl acetate n-hexane 作用下,
以provided tert-butyl 8-((1-(ethoxycarbonyl)-1H-indol-5-yl)sulfonyl)-6-methoxy-3,4-dihydrobenzofuro[3,2-c]pyridine-2(1H)-carboxylate (25 mg, 82%) as a colorless oil的产率得到tert-butyl 8-((1-(ethoxycarbonyl)-1H-indol-5-yl)sulfonyl)-6-methoxy-3,4-dihydrobenzofuro[3,2-c]pyridine-2(1H)-carboxylate