Reaction Steps
[5-(4-Bromo-phenyl)-3-methyl-3H-[1,2,3]triazol-4-yl]-carbamic acid (R)-1-phenyl-ethyl ester (from Example 1, 120 mg, 0.30 mmol), ethyl 2-(4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-phenyl)acetate (130 mg, 0.45 mmol), X-PHOS (43 mg, 0.09 mmol), palladium acetate (10 mg, 0.045 mmol) and potassium phosphate (190 mg, 0.90 mmol) were combined in 5 mL of toluene. Deionized water (1 mL) was added and the mixture was degassed with argon for 2 minutes. The mixture was sealed and stirred at 100° C. for 2 hrs. The mixture was extracted with ethyl acetate and water, washed with brine and dried. Solvents were evaporated and the residue was purified by ISCO flash column chromatography (12 g silica gel, 0% to 70% ethyl acetate in hexanes) to give {4′-[1-methyl-5-((R)-1-phenyl-ethoxycarbonylamino)-1H-[1,2,3]triazol-4-yl]-biphenyl-4-yl}-acetic acid ethyl ester as an amorphous powder (70 mg, 48.3% yield). LC/MS calcd for C28H28N4O4 (m/e) 484.0, obsd 485.1 (M+H); 1H-NMR (400 MHz, CDCl3) δ ppm 1.31 (t, J=7.2 Hz, 3H), 1.53-1.76 (m, 3H), 3.69 (s, 2H), 3.95 (s, 3H), 4.21 (q, J=7.2 Hz, 2H), 5.93 (m, 1H), 6.40 (br s, 1H), 7.31-7.49 (m, 7H), 7.56-7.66 (m, 4H), 7.80 (d, J-6.8 Hz, 2H). {4′-[1-Methyl-5-((R)-1-phenyl-ethoxycarbonylamino)-1H-[1,2,3]triazol-4-yl]-biphenyl-4-yl}-acetic acid ethyl ester (60 mg, 0.124 mmol) was dissolved in 3 mL of THF and lithium hydroxide solution (0.5 N, 1.0 mL) was added. The mixture was stirred at room temperature for 3 hrs. TLC indicated complete consumption of the starting material. The mixture was concentrated and dissolved in water (8 mL). The clear solution was treated with hydrochloric acid (1N, 0.6 mL). The mixture was filtered and the white solid was dried to give {4′-[1-methyl-5-((R)-1-phenyl-ethoxycarbonylamino)-1H-[1,2,3]triazol-4-yl]-biphenyl-4-yl}-acetic acid (51 mg, 90.2% yield). LC/MS calcd for C26H24N4O4 (m/e) 456.0, obsd 457.0 (M+H); 1H-NMR (400 MHz, DMSO-d6) ppm 1.12-1.32 (m, 0.6H), 1.59 (br, 2.4H), 3.64 (s, 2H), 3.89 (s, 3H), 5.80 (br m, 1H), 6.96-7.54 (m, 7H), 7.61-7.74 (m, 4H), 7.80 (d, J=7.6 Hz, 2H), 9.54 and 9.95 (br s, 1H), 12.38 (br s, 1H).
