4-(7-oxo-1,2,3,4,4a,7-hexahydronaphthalen-4a-yloxy)but-2-ynyl4-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85%的产率得到5-hydroxy-12-oxo-3,3a,4,5,7,8,9,10-octahydro-2H-3,5-ethanonaphtho[8a,1-b]furan-3-yl 4-methylbenzoate