Patent ID: 11883379
Assignee: KING FAISAL UNIVERSITY
Field: Pharmaceuticals (Chemistry)
Classification: CPC A  C  Y | IPC A  C

Claim 7:
8. A method of making a 9-fluoro-dibenzo[b,g]indeno[1′,2′:3,4]fluoreno-[1,2-d]oxonine-5,11,16,21-tetraone compound having the formula I:, , the method comprising:
preparing a reaction mixture of indandione and of p-fluorosalicylaldehyde in a presence of 3-aminopropane-1,2-diol or 1,3-diaminopropan-2-ol in ethanol;
refluxing the reaction mixture;
evaporating excess solvent from the reaction mixture under vacuum to obtain a solid; and
recrystallizing the obtained solid from acetic acid to obtain the 9-fluoro-dibenzo[b,g]indeno[1′,2′:3,4]fluoreno-[1,2-d]oxonine-5,11,16,21-tetraone compound.