Potassium Carbonate → HCID 66693011, compound

Participants

Reaction Conditions

Reaction Steps

To a 2-5 ml microwave tube was added (S)-methyl 2-(tert-butoxy)-2-(7-chloro-2-(3-chlorophenyl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)acetate (420 mg, 0.995 mmol), tetrakis(triphenylphosphine)palladium(0) (115 mg, 0.099 mmol), 2-(8-fluoro-5-methylchroman-6-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (320 mg, 1.094 mmol), DMF (4 mL), followed by 2M K2CO3 solution (400 μl). The reaction mixture was heated in a microwave reactor at 125° C. for 45 min. The reaction mixture was filtered and the filtrate was purified by silica gel chromatography to afford (204 mg, 37.2%) of the title compound. Enantiomeric Excess was determined by Chiral SFC method: Chiralpak AD-H analytical column, 4.6×250 mm, 5 μm. Mobile Phase: 15% MeOH in CO2. Temp: 35° C. Flow rate: 2.0 mL/min. for 10 min. UV monitored @ 266 nm. Injection: 5 uL of ˜2.0 mg/mL solution in 50:50 MeOH:CHCl3. The enantiomeric Excess is 93.0%. 1H NMR (500 MHz, CHLOROFORM-d) δ 7.83-7.78 (m, 1H), 7.69 (dt, J=6.7, 1.8 Hz, 1H), 7.35-7.28 (m, 2H), 6.87 (d, J=10.7 Hz, 1H), 6.84 (s, 1H), 5.00 (s, 1H), 4.48-4.26 (m, 2H), 3.64 (s, 3H), 2.85-2.67 (m, 5H), 2.30-2.13 (m, 2H), 1.84 (s, 3H), 1.16 (s, 9H).

Provenance & Evidence