| abstract |
A novel process for preparing valsartan and novel intermediates useful in the preparation thereof is provided. [Solution] Formula (II), [Chemical 1] Opening the oxazolidinone ring of the compound of: and a) W is [Chemical 3] Removing the protecting group Q if it is a group; or b) if W is a -CN group, converting it to a 5-tetrazoyl group; And, optionally, a method of preparing valsartan or a pharmaceutically acceptable salt thereof comprising the step of converting the obtained valsartan to a pharmaceutically acceptable salt thereof. [Selection figure] None |