Cesium carbonate → HCID 178497581, compound

Participants

Reaction Conditions

Reaction Steps

N-(Trans-3-(6-chloro-9H-purin-9-yl)cyclobutyl)quinazolin-2-amine (example 21, 0.110 g, 0.313 mmol), tetrakis(triphenylphosphine)palladium (0.018 g, 0.016 mmol), (4-methoxycarbonylphenyl)boronic acid (0.073 g, 0.406 mmol), and cesium carbonate (0.357 g, 1.094 mmol) were suspended in a mixture of dioxane (1.25 mL) and water (0.15 mL) and heated in the microwave to 120° C. for 25 minutes. The crude was partitioned between ethyl acetate (200 mL) and water (200 mL). The organic phase was dried with magnesium sulfate and evaporated to dryness under reduced pressure. Purification using silica chromatography (0-3% methanol in dichloromethane gradient) gave the desired methyl 4-(9-(trans-3-(quinazolin-2-ylamino)cyclobutyl)-9H-purin-6-yl)benzoate (0.0531 g, 0.118 mmol, 37.6% yield). M+1: 452.1. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 2.89 (ddd, J=13.60, 8.51, 4.89 Hz, 2 H) 3.15-3.33 (m, 2 H) 3.98 (s, 3 H) 4.89-5.00 (m, 1 H) 5.44 (quin, J=7.34 Hz, 1 H) 7.30-7.35 (m, 1 H) 7.65 (d, J=8.41 Hz, 1 H) 7.69-7.81 (m, 2 H) 8.24 (d, J=8.41 Hz, 2 H) 8.45 (s, 1 H) 8.84 (d, J=8.41 Hz, 2 H) 9.01-9.14 (m, 2 H).

Provenance & Evidence