| http://www.w3.org/ns/prov#value | - Triethyloxonium fluoborate readily ethylates such compounds as ethers, sulfides, nitriles, ketones, esters, and amides on oxygen, nitrogen, or sulfur to give onium fluoborates (often isolable) that can react with nucleophilic reagents to give useful products.5 For example, dimethylformamide gives the imino ether fluoborate [(CH3)2NCH-OC2H5]+ BF4???, which is converted to (CH3)2NCH(OC2H5)2 by sodiu
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