7,8-dihydroxy-3-(3',4'-dihydroxyphenyl)coumarin 、 tri(ethylene glycol) ditosylate 在
sodium carbonate 作用下,
以
乙腈 为溶剂,
以22%的产率得到14-(2,3,5,6,8,9-hexahydrobenzo[b][1,4,7,10]tetraoxacyclododecin-12-yl)-5,6,8,9-tetrahydro-2H-[1,4,7,10]tetraoxacyclododeca[2,3-h]chromen-15(3H)-one