Patent ID: 11897901
Assignee: KING FAISAL UNIVERSITY
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  A | IPC A  C

Claim 4:
5. A method of making the 6-amino-8,9-di(4-methoxyphenyl)-2-oxo-3,9-dihydro-2H-[1,3]thiazolo[5′,4′:5,6]pyrano[2,3-b]pyridine-7-carbonitrile compound of claim 1, the method comprising:
mixing equimolar amounts of 4-methoxybenzaldehyde and malonitrile in isopropyl alcohol in a presence of NH4OH as a basic catalyst for at least about 2 hours followed by adding thizolidine-2,4-dione to obtain a reaction mixture;
refluxing the reaction mixture for at least about 2 hours to obtain a precipitate; and
obtaining the 6-amino-8,9-di(4-methoxyphenyl)-2-oxo-3,9-dihydro-2H-[1,3]thiazolo[5′,4′:5,6]pyrano[2,3-b]pyridine-7-carbonitrile compound.