反应详情

Following the general procedure for the formation of the corresponding sodium carboxylates of acyloxyalkyl carbamates of tranexamic acid, 5.03 g (15.94 mmol) of trans-4-{[1-(2-methylpropanoyloxy)ethoxycarbonyl]-aminomethyl}-cyclohexanecarboxylic acid 13 was reacted with 1.34 g (15.94 mmol) of sodium bicarbonate (NaHCO3) in 40 mL of a mixture of acetonitrile and water (1:1) to yield 5.38 g (quant.) of the title compound 14 as a colorless powder. 1H NMR (400 MHz, DMSO-d6): δ=0.72-0.84 (br. m, 2H), 1.057 (d, J=6.4 Hz, 3H), 1.059 (d, J=6.8 Hz, 3H), 1.20-1.32 (br. m, 3H), 1.38 (d, J=5.2 Hz, 3H), 1.59-1.73 (br. m, 3H), 1.75-1.83 (m, 2H), 2.43-2.53 (m, 1H), 2.72-2.84 (br. m, 2H), 6.62 (q, J=5.6 Hz, 1H), 7.42 (t, J=5.6 Hz, 1H). MS (ESI) m/z 338.16 (M+Na)+; 314.12 (M−H)−.