(−)-O,O′-di-pivaloyl-L-tartaric acid; lithium diisopropyl amide in tetrahydrofuran; diethyl ether T=-105°C; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

(−)-O,O′-di-pivaloyl-L-tartaric acid; lithium diisopropyl amide in tetrahydrofuran; diethyl ether T=-105°C; Yield given. Yields of byproduct given. Title compound not separated from byproducts;