Lithium Hydroxide → (3R)-3-[(3,5-Dichloro-4′-fluoro[1,1′-biphenyl]-4-yl)methyl]-1-(4,5,6,7-tetrahydro-1H-indazol-6-yl)-2-pyrrolidinone

Participants

Reaction Steps

Purge a solution of trifluoro-methanesulfonic acid 3,5-dichloro-4-[(R)-2-oxo-1-(1-trifluoromethanesulfonyl-4,5,6,7-tetrahydro-1H-indazol-6-yl)-pyrrolidin-3-ylmethyl]-phenyl ester and trifluoro-methanesulfonic acid 3,5-dichloro-4-[(R)-2-oxo-1-(2-trifluoromethanesulfonyl-4,5,6,7-tetrahydro-2H-indazol-6-yl)-pyrrolidin-3-ylmethyl]-phenyl ester (Preparation 83) (0.573 g, 0.89 mmol), 4-fluorophenylboronic acid (0.149 g, 1.06 mmol), and 2M sodium carbonate (1.3 mL) in THF (22 mL) with nitrogen. Treat the reaction with tetrakis(triphenylphosphine)palladium(0) (0.051 g, 0.044 mmol) and heat the reaction to 80° C. and stir for 1 hr. Cool to room temperature and treat the reaction with 2N LiOH (4.5 mL) and stir for 1 hr. Dilute the reaction with water and extract with ethyl acetate. The organic layer is dried (Na2SO4) and the solvent is removed to afford crude product that is purified first with 0 to 10% methanol in CH2Cl2 and then with a Varian 10 g SCX column with 9/1 CH2Cl2/MeOH and then 2:1 CH2Cl2/2M NH3 in MeOH to afford 0.233 g (57%) of the titled product. MS (m/z): 458 (M+1).

Provenance & Evidence