反应详情

The procedure of Step 3 of Example 1 was repeated except for using 3-(4-fluorophenyl)-2,3-dihydro-6-hydroxyinden-1-one obtained in Step 2 as a starting material instead of 2,3-dihydro-6-hydroxy-3-phenylinden-1-one and being stirred for 2 h to obtain the title compound (99%).