... It was also discovered during the stage one development that the reaction worked better in a 50/50 (w/w) mixture of acetonitrile/ethyl acetate, and ... dd, J = 12.5, 6.0 Hz, 1H), 3.81 (dd, J = 12.5, 6.0 Hz, 1H), 4.40 (q, J = 6.0 Hz 1H), 4.59 (dd, J = 6.0, 3.5 Hz, 1H), 4.78 (t, J = 3.5 Hz ...