、
(3aS,5aS,9bS)-5a,9-dimethyl-3-methylene-3a,5,5a,9b-tetrahydronaphtho[1,2-b]furan-2,8(3H,4H)-dione 以
四氢呋喃 为溶剂,
反应 2.42h,
以75%的产率得到(3aR,5aS,9bS)-3'-(4-bromo-3-fluorophenyl)-5a,9-dimethylspiro[3a,4,5,9b-tetrahydrobenzo[g][1]benzofuran-3,5'-4H-1,2-oxazole]-2,8-dione