Trifluoroacetic acid methylene chloride → HCID 90055863, compound

Participants

Reaction Steps

To a solution of tert-butyl (1R,2S,3S,5R)-2-(2-(tert-butyldimethylsilyloxy)ethylthio)-5-(3-(6-(2,6-difluorophenyl)-5-fluoropicolinamido)pyridin-4-yl)-3-methylcyclohexylcarbamate (1.0 equiv.) in THF (0.04 M) in a 0° C. bath was added oxone (2.0 equiv.) as a solution in H2O. The solution was left stirring at rt for 48 hrs. The solution was diluted with EtOAc, washed with H2O, Na2CO3(sat.), NaCl(sat.), dried over MgSO4, filtered, concentrated to yield Boc protected product. The material was treated with 25% TFA/CH2Cl2 for 30 minutes, at which time the volatiles were removed in vacuo, the residue was dissolved in DMSO and purified by reverse phase HPLC. The product fractions were lyophilized directly to N-(4-((1R,3R,4S,5S)-3-amino-4-(2-hydroxyethylsulfonyl)-5-methylcyclohexyl)pyridin-3-yl)-6-(2,6-difluorophenyl)-5-fluoropicolinamide in 44% yield. LC/MS (m/z)=549.6 (MH+), Rt=0.58 min. 1H NMR (400 MHz, <dmso>) δ ppm 10.51 (s, 1H), 8.53 (s, 1H), 8.51 (d, J=4.0, 1H), 8.33 (dd, J=8.0, 4.0, 1H), 8.20 (t, J=8.0, 1H), 8.09 (broad doublet, J=4.0, 2H), 7.65-7.75 (m, 1H), 7.36 (t, J=8.0, 2H), 7.30 (d, J=8.0, 1H), 3.84-4.02 (m, 3H), 3.58-3.68 (m, 1H), 3.43-3.53 (m, 1H), 3.28-3.36 (m, 1H), 3.04-3.14 (m, 1H), 1.92-2.18 (m, 4H), 1.56-1.63 (m, 1H), 1.24 (d, J=8.0, 3H).

Provenance & Evidence