1: 90 percent / aq. ethanol / 1.) 0 deg C, 45 min, 2.) room temperature, 1-2 h, 3.) 0 deg C, overnight 2: NaH / bis-(2-methoxy-ethyl) ether / 130 °C View Scheme

1: 90 percent / aq. ethanol / 1.) 0 deg C, 45 min, 2.) room temperature, 1-2 h, 3.) 0 deg C, overnight 2: NaH / bis-(2-methoxy-ethyl) ether / 130 °C View Scheme