Gallopamil (INN) is an L-type calcium channel blocker that is an analog of verapamil. It is used in the treatment of abnormal heart rhythms.
The alkylation reaction of 3,4,5-trimethoxyphenylacetonitrile (1) and isopropyl chloride (2), using sodium amide as base gives the intermediate nitrile (3). A second alkylation with a specific alkyl chloride (4) yields gallopamil.