Abstract
Pinacol dimethyl ether (2,3-dimethoxy-2,3-dimethylbutane) was reported to be a superior solvent for lithium-oxygen batteries because of lacking α-H-atoms, thus, shutting down the major decomposition pathway in such devices. An improved Williamson ether synthesis of this solvent is reported starting from pinacol and methyl iodide. Crucial for the success of this double alkylation reaction was the choice of methyl lithium as the base.
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