1: 51 percent / LDA / tetrahydrofuran / 1.) -80 deg C, 5 h, 2.) from -80 deg C to -30 deg C 2: 1.) citric acid, 2.) sodium carbonate / 1.) THF, water, 0 deg C, 48 h, 2.) water View Scheme

sodium carbonate; citric acid 1.) THF, water, 0 deg C, 48 h, 2.) water; Yield given. Multistep reaction. Yields of byproduct given;