4a,8a-Ditert-butyl-3,7-bis(4-chlorophenyl)-3a,7a-dihydro-[1,2]oxazolo[5,4-f][1,2]benzoxazole-4,8-dione 在
sodium hydroxide 作用下,
反应 24.0h,
以68%的产率得到6a-tert-Butyl-6-[5-tert-butyl-3-(4-chloro-phenyl)-4,5-dihydro-isoxazol-4-yl]-3-(4-chloro-phenyl)-6-hydroxy-6,6a-dihydro-3aH-furo[3,4-d]isoxazol-4-one