4-(6-oxo-2,3,3a,6-tetrahydro-1H-inden-3a-yloxy)but-2-ynyl 4-methylbenzoate 在
silver hexafluoroantimonate 、 3,3'-bis[3,5-bis(trifluoromethyl)phenyl]-1,1'-binaphthyl-2,2'-diyl hydrogenphosphate 、
水 作用下,
以
1,2-二氯乙烷 为溶剂,
以58%的产率得到8-hydroxy-6-oxo-2,3,5,5a,6,7,8,9-octahydro-1H-3a,8-ethenocyclopenta[c]isobenzofuran-5a-yl 4-methylbenzoate