(E)-dimethyl 2-((2-isopropyl-4-phenylbut-3-en-1-yl)oxy)malonate 在
manganese(III) triacetate dihydrate 、 copper(II) bis(trifluoromethanesulfonate) 作用下,
以
乙腈 为溶剂,
反应 6.0h,
以92%的产率得到(3S*,3aR*,4S*,6aS*)-methyl 3-isopropyl-6-oxo-4-phenyltetrahydrofuro[3,4-b]furan-6a(6H)-carboxylate