... The Journal of Organic ... The organic layer was washed with potassium hydroxide (5% aqueous), and the aqueous layer was separated and brought to pH 2−3 by the addition of ... 37 mp 141 °C); 1 H NMR (CDCl 3 ) δ 2.80 (2H, t, J = 6.56 Hz), 3.20 (2H, t, J = 6.56 Hz), 7.20 (1H, d, J ...