A Process for production of 1-(3-(2-(1-benzothiophen-5-yl)ethoxy)propyl)azetidin-3-ol or salts thereof which comprises using as a starting compound as a (phenylthio)acetic acid derivative or salts thereof represented by the general formula:
wherein X 1 represents a halogen atom, is useful as a safe process for mass production of 1-(3-(2-(1- benzothiophen-5-yl)ethoxy)propyl)azetidin-3-ol or salts thereof which is useful as a remedy for disease of central and peripheral nerve.
