Potassium Phosphate, Tribasic → HCID 68007534, compound

Participants

Reaction Conditions

Reaction Steps

K3PO4 (2.59 g, 12.21 mmol) in water (6 mL) and 2-Me-THF (20 mL) was purged with a flow of nitrogen for 30 min. Added (1R,3S)-3-[(2-chloro-5-fluoro-pyrimidin-4-yl)amino]cyclohexanol, 75a, (1.00 g, 4.07 mmol) and 5-fluoro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1-tosyl-1H-pyrrolo[2,3-b]pyridine, 44a, (2.03 g, 4.88 mmol) and then purged with nitrogen for another 15 min. The reaction was then heated to 70° C. and then charged with Tris(dibenzylideneacetone)dipalladium (0.07 g, 0.08 mmol) and X-Phos (0.14 g, 0.28 mmol) under nitrogen. (Note Color changed from purple to hunter green). The reaction was heated to reflux for 1 h and 20 min. The reaction was cooled slowly to room temperature overnight. The mixture was treated with 100 mL of brine and 100 mL of ethyl acetate and separated the two layers. The aqueous phase was extracted again with EtOAc (50 mL). Combined organic layers and passed through a plug of fluoracil, dried over Na2SO4, decanted and removed the solvent by rotoevaporation to give crude product which was then purified by silica gel chromatography (25-50% EtOAc/Hexanes) to afford the desired product.

Provenance & Evidence