Hexane → HCID 19784798, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of N1 -(2,2,2,-trifluoroethyl)-2-nitro-p-phenylene-diamine (6) (0.705 g, 3 mmol), 2-chloroethyl chloroformate (0.515 g, 3.6 mmol) and CaCo3 (0.40 g, 4 mmol) in dioxane (10 ml) was stirred at 80° C. for 20 minutes, filtered and washed with ethyl acetate. The combined filtrate was washed with water and brine, dried (Na2SO4), and evaporated to give a brown oil. Trituration with hexane gave 2-chloroethyl-N-[4-(2,2,2-trifluoroethyl)-3-nitrophenyl]-carbamate (8) as an orange solid. The unpurified carbamate (8) was dissolved in aqueous ethanol (ETOH: H2O, 15/5 ml) and powdered KOH (1.35 g) was added. The mixture was stirred at 90° C. for 20 minutes and then poured onto crushed ice (20 g) . The resultant mixture was extracted with ethyl acetate, washed with water and brine, dried (Na2SO4), and evaporated to give 0.544 g (65% yield) of N1 -(2,2,2-trifluoroethyl)-N4 -(2-hydroxyethyl)-2-nitro-p-phenylenediamine (9): mp 93°-95° C.; MS m/e 279(M+); 1HNMR (acetone-d6), δ3.25 (m, 2H), 3.76 (m, 2H), 3.91 (bs, 1H), 4.34 (m, 2H), 4.98 (bs, 1H), 7.19 (m, 2H), 7.35 (s,1H), 7.80 (bs, 1H).

Provenance & Evidence