Nitrogen → 1-{4-[(2R,4S)-4-((3,5-bis-trifluoromethyl-benzyl)-{5-[1-(tetrahydro-pyran-2-yl)-1H-pyrazol-4-yl]-pyrimidin-2-yl}amino)-2-ethyl-pyrrolidin-1-yl]-5-chloro-pyrimidin-2-yl}-piperidine-4-carboxylic acid ethyl ester

Participants

Reaction Steps

A 25 ml round-bottom flask is charged with 1-(tetrahydro-pyran-2-yl)-4-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-1H-pyrazole (83 mg, 0.3 mmol), 1-(4-{(2R,4S)-4-[(3,5-bis-trifluoromethyl-benzyl)-(5-bromo-pyrimidin-2-yl)-amino]-2-ethyl-pyrrolidin-1-yl}-5-chloro-pyrimidin-2-yl)-piperidine-4-carboxylic acid ethyl ester (178 mg, 0.23 mmol) under N2. Pd(PPh3)4 (57 mg, 0.05 mmol) is added promptly and the flask is recharged with N2. Then DME (1 ml), Na2CO3 (1 M in H2O, 0.45 ml, 0.45 mmol) are added. The mixture is then heated to 95 degree for 2 hrs. After cooling down to rt, NaIO4 (140 mg, 0.72 mmol) is added into reaction mixture. Stirring is continued for 1 h to give white suspension. H2O and dichloromethane are added, and then organic layer is collected. Removal of solvent give 1-{4-[(2R,4S)-4-((3,5-bis-trifluoromethyl-benzyl)-{5-[1-(tetrahydro-pyran-2-yl)-1H-pyrazol-4-yl]pyrimidin-2-yl}-amino)-2-ethyl-pyrrolidin-1-yl]-5-chloro-pyrimidin-2-yl}-piperidine-4-carboxylic acid ethyl ester which is used without further purification.

Provenance & Evidence