Process for producing of 4-(2-methoxyethyl)-phenylglycidyl ether and/or metoprolol.

摘要

A process for the preparation of metoprolol in a stereospecifice form or a pharmaceutically acceptable salt thereof like an acid addition salt, and/or a stereospecific form of 4-(2-methoxyethyl)-phenylglycidyl ether which comprises subjecting 4-(2-methoxyethyl)-phenylallyl ether to the action of a micro-organism having the ability for stereoselective epoxidation of 4-(2-methoxyethyl)-phenylallyl ether into 4-(2-methoxyethyl)-phenylglycidyl ether, having at least 80% by weight the S configuration, at least partly separating 4-(2-methoxyethyl)-phenylglycidyl ether with isopropylamine and at least partly separating metoprolol and/or converting metoprolol into the pharmaceutically acceptable salt thereof.