Acetonitrile → HCID 178454729, compound

Participants

Reaction Steps

Following the general procedure for the formation of the corresponding sodium carboxylates of acyloxyalkyl carbamates of tranexamic acid, 90.0 mg (0.2854 mmol) of (−)-trans-4-({[(1R)-1-(2-methylpropanoyloxy)ethoxy]carbonylamino}methyl)-cyclohexanecarboxylic acid 17 was reacted with 24.0 mg (0.2854 mmol) of sodium bicarbonate (NaHCO3) in 4 mL of a mixture of acetonitrile and water (1:1) to yield 96.3 mg (quant.) of the title compound 18 as a colorless powder. The enantiomeric excesses were determined with an analytical Waters 2690/ZQ LC/MS apparatus using a ChiralPak AD-RH column, an isocratic eluent consisting of 30% acetonitrile/70% water/0.05% formic acid, and a flowrate of 60 μL/min (Rf=15.0 min; e.e.=97.7%). 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)−.

Provenance & Evidence