2-(Tri-n-butylstannyl)oxazole → HCID 90413092, compound

Participants

Reaction Conditions

Reaction Steps

In a microwave vial was dissolved the title compound of Example 277 (30 mg, 0.06 mmol) and 2-(tributylstannyl)oxazole (15 μL, 0.07 mmol) in DME (1 mL). The solution was degassed with N2 for 5 minutes then CuI (1 mg, 0.0045 mmol) and Pd(PPh3)4 (5 mg, 0.0045 mmol) were added. The reaction was purged with N2 and heated at 145° C. for 3 h. The reaction was cooled to rt, filtered through a pad of celite and purified via prep HPLC to give the title compound (19 mg, 72%). MS (ESI) mass calcd. for: C21H17F4N5O2, 447.1; m/z found 448.1 [M+H]+. 1H NMR (500 MHz, Chloroform-d) 8.49 (s, 1H), 8.36 (s, 0.8H), 7.85 (s, 0.8H), 7.76 (s, 0.4H), 7.62-7.45 (m, 1H), 7.43-7.33 (m, 1H), 7.32-7.23 (m, 2H), 7.23-7.09 (m, 1H), 4.91-4.85 (m, 0.4H), 4.78 (d, J=5.4 Hz, 0.6H), 4.42 (td, J=8.6, 2.8 Hz, 0.6H), 4.28 (td, J=8.2, 3.6 Hz, 0.4H), 4.00-3.95 (m, 0.6H), 3.89 (d, J=4.4 Hz, 0.4H), 2.23-1.44 (m, 6H).

Provenance & Evidence