Cesium carbonate → HCID 86665116, compound

Participants

Reaction Conditions

Reaction Steps

To a vial was added Pd2dba3 (0.235 g, 0.257 mmol), Cs2CO3 (2.37 g, 7.28 mmol) and Ru-Phos (0.240 g, 0.514 mmol) in t-AmOH (8.00 mL). The mixture was evacuated and purged with N2. The mixture was stirred at about 65° C. for about 20 min. 2-Chloro-N-(2,2-difluoroethyl)furo[3,2-d]pyrimidin-4-amine (1.00 g, 4.28 mmol) and 6-amino-3,3-dimethylindolin-2-one (0.754 g, 4.28 mmol, Astatech) were added in one portion. Additional t-AmOH (12.00 mL) was added. The mixture was evacuated and purged with N2. The mixture was stirred at about 70° C. for about 5 h, stirred at about 60° C. for about 15 h and then stirred at about 75° C. for about 2 h. The mixture was cooled to rt and filtered. The precipitate was washed with DCM (20 mL) and MeOH (20 mL). The combined filtrate was concentrated and purified by column chromatography eluting with 25-65% EtOAc/heptane (40 g silica gel) to give a crude material. The material was suspended in Et2O (about 15 mL) and sonicated. The suspension was filtered and washed with Et2O (50 mL), then with DCM (about 30 mL). The precipitate was dissolved in DCM (50 mL), combined with filtrate, concentrated under reduced pressure, dissolved in MeOH (40 mL), and adsorbed onto silica gel (Mesh#200-400, 60A°; 3 g). The material was purified by column chromatography eluting with 0 to 28% of 10% MeOH/DCM and DCM (40 g silica gel) to give a solid. The solid was purified by mass-triggered HPLC (Table 2, Method x) purification to give 6-(4-(2,2-difluoroethylamino)furo[3,2-d]pyrimidin-2-ylamino)-3,3-dimethylindolin-2-one (0.397 g, 25%): LC/MS (Table 2, Method c) Rt=1.75 min.; MS m/z: 374 (M+H)+. Syk IC50=A

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