Sodium Carbonate → (R)-3',5'-dichloro-4'-[2-oxo-1-(4-triisopropylsilanyloxy-piperidin-1-yl)-pyrrolidin-3-ylmethyl]-biphenyl-4-carboxylic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

Bring a mixture of (R)-trifluoro-methanesulfonic acid 3,5-dichloro-4-[2-oxo-1-(4-triisopropylsilanyloxy-piperidin-1-yl)-pyrrolidin-3-ylmethyl]-phenyl ester (0.52 g, 0.8 mmol), 4-methoxycarbonylphenylboronic acid (0.174 g, 0.966 mmol), sodium carbonate (0.256 g, 2.41 mmol) in THF (20 mL) and water (6 mL) to 60° C. To the mixture at 60° C., add Pd(PPh3)4 (0.046 g, 0.04 mmol) and raise the reaction temperature to 80° C. and stir for 1 hour. Cool the reaction, dilute with ethyl acetate, and wash with water and brine. Dry the organic layer (Na2SO4), remove the solvent in vacuo to afford crude product, and purify on silica gel column with 25% to 50% ethyl acetate in hexanes gradient to afford 0.49 g (96%) of the titled product. MS (m/z): 633 (M+).

Provenance & Evidence