'Reference 21, mp 206 OC (56% 1. Heated 1.7 h at 135 OC. Recrystallized from toluene. Heated Id at 140 OC. e Impure by TLC (CHCW MeOH/EtSN, 5Ol: trace), mainly Rf 0.3. f Heated 5 h. 8 Contains starting acid aa impurity. Reaction mixture waa extracted with 1 N NaOH vd the extract acidified (dilute HCl). Starting 4-(2-propenyloxy) benzenamine. Claisen, L. Ann. 1919, 418, 78. Not distilled. Heated 3d. J Heated 2d, extracted with dilute NKOH.* ...