2-[4-[4-[4-(Hydroxydiphenylmethyl)-1-piperidinyl]-1-oxobutyl]phenyl]-2,2-dimethylacetic acid methyl ester

It serves as a precursor that undergoes reduction of the ketone group and hydrolysis of the methyl ester to produce Fexofenadine hydrochloride. 2-[4-[4-[4-(Hydroxydiphenylmethyl)-1-piperidinyl]-1-oxobutyl]phenyl]-2,2-dimethylacetic acid methyl ester is a key intermediate, often called 1-oxo fexofenadine methyl ester, employed to synthesize the antihistamine Fexofenadine.

API Name Fexofenadine
CAS No 154477-55-1
Molecular Formula C33H39NO4
Molecular Weight 513.7 g/mol
Synonyms methyl 2-[4-[4-[4-[hydroxy(diphenyl)methyl]piperidin-1-yl]butanoyl]phenyl]-2-methylpropanoate