Sodium Bicarbonate → 1,1-dimethylethyl 4-[2-(4-amino-5-{1-[(2,5-difluorophenyl)acetyl]-2,3-dihydro-1H-indol-5-yl}-7H-pyrrolo[2,3-d]pyrimidin-7-yl)ethyl]-1-piperidinecarboxylate

Participants

Reaction Conditions

Reaction Steps

To 1,1-dimethylethyl 4-[2-(4-amino-5-bromo-7H-pyrrolo[2,3-d]pyrimidin-7-yl)ethyl]-1-piperidinecarboxylate (220 mg, 0.518 mmol) and 1-[(2,5-difluorophenyl)acetyl]-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-2,3-dihydro-1H-indole (290 mg, 0.726 mmol) in a 5 ml sealable vial was added 1,4-Dioxane (2 mL) and saturated NaHCO3 (1 mL). The mixture was then bubbled with N2 for 10 minutes then Pd(Ph3P)4 (59.9 mg, 0.052 mmol) was added and N2 was bubbled for 5 minutes. The mixture was then capped and heated at 100° C. After 4 hours the reaction was complete. The reaction was diluted with water (5 ml) then extracted with EtOAc (3×10 ml). The organics were combined, washed with brine, dried over MgSO4, filtered and concentrated. The crude oil was then dissolved in 3 mL of DMSO and then purified on HPLC: (HPLC condition: Gilson using Trilution software with a Sunfire 5u C18(2) 100A. 50×30.00 mm 5 micron. 7.3-minute run (47 ml/min, 2% ACN/H2O, 0.1% TFA to 32% ACN/H2O, 0.1% TFA) with UV detection at 220 nm). Product fractions were combined and the volume was reduced to remove most of the MeCN. The water left behind was added saturated NaHCO3 and then extracted with EtOAc (3×15 mL). The organic was combined wash with saturated NaCl solution, dried over MgSO4, filtered and concentrated. Then the material was transferred to a 40 mL vial with MeCN, then water was added and it was freeze-dried to isolate 1,1-dimethylethyl 4-[2-(4-amino-5-{1-[(2,5-difluorophenyl)acetyl]-2,3-dihydro-1H-indol-5-yl}-7H-pyrrolo[2,3-d]pyrimidin-7-yl)ethyl]-1-piperidinecarboxylate (151 mg, 47.2% yield) as a white powder. LC-MS (ES) m/z=617.6 [M+H]+.

Provenance & Evidence