Water → HCID 22086866, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of the compound obtained in Example 12 (0.10 g, 0.18 mmol) in chloroform (5 ml) is added a solution of titanium(IV) isopropoxide (0.3 ml, 1.0 mmol) in 2-propanol (10 ml). Then the mixture is refluxed at 80° C. for 8 hours, successively is stirred at room temperature for 150 minutes. To this mixture is added a mixture of chloroform (50 ml) and water (50 ml). The aqueous layer is extracted with chloroform (20 ml). The combined organic extract is dried over Na2SO4 and concentrated under reduced pressure to give the residue, which is chromatographed on silica gel to afford white-brown crystalline solid, which is recrystallized from chloroform-n-hexane to afford pale brown crystals (0.58 g, 94%).

Provenance & Evidence