Sodium Carbonate → (2S)-Methyl 2-(7-(4-allyl-5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-2-(2'-(but-3-en-1-yl)-[1,1'-biphenyl]-3-yl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate

Participants

Reaction Conditions

Reaction Steps

A solution of (2S)-methyl 2-(7-(4-allyl-5-chloro-3,4-dihydro-2H-benzo[b][1,4]oxazin-6-yl)-2-(3-bromophenyl)-5-methylpyrazolo[1,5-a]pyrimidin-6-yl)-2-(tert-butoxy)acetate (0.092 g, 0.143 mmol), (2-(but-3-en-1-yl)phenyl)boronic acid (0.050 g, 0.286 mmol) and 2.0 M aq. Na2CO3 (0.179 mL, 0.358 mmol) in DMF (4 mL) was sparged with nitrogen for 10 min, treated with Pd(Ph3P)4 (0.012 g, 10.01 μmol), sparged for 5 min, then heated (90° C.) for 5 h. The reaction was cooled, then diltued with EtOAc (20 mL) and washed with water (10 mL) and brine (10 mL). The organic layer was dried (Na2SO4), filtered, and concentrated and the residue was purified by biotage (Isco 4 g SiO2, 0% (5 CV), 0-60% (20 CV), 60% (5 CV), EtOAc in hexanes) to afford the desired product (0.099 g, 0.143 mmol, 100% yield). LCMS (M+H)=691.4.

Provenance & Evidence