Are there alternatives to N-Ethylethanaminium bromide (CAS: 6274-12-0) in synthesis?

Yes, there are alternatives such as other quaternary ammonium salts like N-tetradecyltrimethylammonium bromide or N-cetyltrimethylammonium bromide. These can be used depending on the specific requirements of the synthesis process. Common substitutes include various amines and their derivatives that can serve similar functional roles in chemical reactions.