Methyl valinate hydrochloride → HCID 67409233, compound

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Reaction Steps

L-valine methyl ester hydrochloride is N-alkylated with 4-bromomethyl-2′-cyanobiphenyl, the product 4-[(2′-cyanobiphenyl-4-yl)methyl]-(L)-valine methyl ester thus formed is N-acylated with valeryl chloride to give N-[(2′-cyanobiphenyl-4-yl)methyl]-N-valeryl-(L)-valine methyl ester. N-[(2′-cyanobiphenyl-4-yl)methyl]-N-valeryl-(L)-valine methyl ester is treated with tributyltin azide to give valsartan methyl ester, which is then hydrolyzed under alkaline condition to give finally valsartan.

Provenance & Evidence