3-Pyridinylboronic acid → HCID 178487830, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 2-chloro-6-methoxyquinazolin-4-ol (1.20 g, 5.7 mmol, 1.0 eq.), pyridin-3-ylboronic acid (1.27 g, 8.6 mmol, 1.5 eq.), K2 CO3 (2.37 g, 17.1 mmol, 3.0 eq.) in dioxane (100 mL) and 1H2O (10 ml) was added Pd(PPh3)2Cl2 (230 mg, 0.29 mmol, 0.05 eq.) under N2 atmosphere. The resulting mixture was stirred at 105° C. under N2 atmosphere overnight. After reaction was completed, the mixture was cooled to room temperature, and the resultant precipitate was removed by filtration. The filtrate was concentrated in vacuo and the residue was partitioned between H2O (30 mL) and ethyl acetate (100 mL×3). The combined organic layers were washed with brine, dried over MgSO4. After filtration and evaporation, the crude product was obtained, which was combined with the filter cake and dried in vacuo to give 1.35 g of 6-methoxy-2-(pyridin-3-yl) quinazolin-4-ol as a gray solid. LCMS m/z=254.1 (M+1) (Method B) (retention time=1.39 min). The crude product was used for the next step without further purification.

Provenance & Evidence