Tetrahydrofuran → 2-(3-Iodopyridin-4-yl)-5-(trifluoromethyl)benzoxazole

Participants

Reaction Conditions

Reaction Steps

To a mixture of 1.81 g of N-[2-hydroxy-5-(trifluoromethyl)phenyl]-3-iodoisonicotinamide, 20 ml of tetrahydrofuran and 1.34 g of triphenylphosphine, 2.22 g of 40% toluene solution of diethyl azodicarboxylate was added dropwise at room temperature. The reaction mixture was stirred while heating at 50° C. for one hour. The reaction mixture was cooled to room temperature, and then the reaction mixture was concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 1.40 g of 2-(3-iodopyridin-4-yl)-5-(trifluoromethyl)benzoxazole (hereinafter, referred to as “active compound 29”).

Provenance & Evidence