diethyl 2-((1-hydroxycyclohexyl)ethynyl)-4-(3-hydroxyphenyl)-6-methyl-4H-pyran-3,5-dicarboxylate 在
碘 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以70%的产率得到ethyl 7-(1-hydroxycyclohexyl)-4-(3-hydroxyphenyl)-8-iodo-2-methyl-5-oxo-4,5-dihydropyrano[4,3-b]pyran-3-carboxylate