The invention relates to heterocyclic derivatives as well as their pharmaceutically acceptable salts. The invention further relates to a process for the preparation of such compounds. The compounds of the invention are mGluR5 modulators and are therefore useful for the control and prevention of acute and/or chronic neurological disorders.本發明係關於雜環衍生物以及其藥學上可接受之鹽類。本發明更進一步關於此化合物之製法。本發明化合物為mGluR5調節劑,因此用於控制及預防急性及/或慢性神經學病症。