... The Journal of Organic ... NaHCO 3 (aq) and brine and dried over Na 2 SO 4 . The organic phase was concentrated in vacuo, and the residue was purified by silica ... s), 1.04 (3H, s), 1.05−1.16 (23H, m), 1.19 (9H, s), 1.36−1.56 (2H, m), 1.60−1.68 (2H, m), 1.76 (1H, td, J = 13.2, 4.0 Hz ...