Sodium Bicarbonate → HCID 67003597, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of Example 229B (0.808 g, 1.730 mmol), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-5,6-dihydropyridine-1(2H)-carboxylate (Frontier Scientific, 0.588 g, 1.903 mmol) and sodium hydrogencarbonate (0.436 g, 5.19 mmol) in degassed N,N-dimethylformamide (10.81 mL) and water (3.6 mL) was treated with bis(triphenylphosphine)palladium(II) chloride (0.121 g, 0.173 mmol) under nitrogen and the mixture was heated at 72° C. for 24 hours. The mixture was cooled to ambient temperature, suspended in 80 mL water, stirred for 30 minutes and filtered. Purification by flash chromatography on silica gel (AnaLogix IntelliFlash 280) eluting with a gradient of 0-20% ethyl acetate in hexanes afforded the title compound. MS (ESI+) m/z 522.2 (M+H)+.

Provenance & Evidence