反应详情

3-Bromo-6-methoxy-2-methylpyridine (50 mg, 0.247 mmol), ethane-1,2-diamine (0.083 ml, 1.237 mmol), sodium tert-butoxide (47.6 mg, 0.495 mmol) and dicyclohexyl-[3,6-dimethoxy-2-(2,4,6-thisopropylphenyl)phenyl]phosphane (6.64 mg, 0.012 mmol) were dissolved under argon in anhydrous 1,4-dioxane (2.5 ml). Next, Pd2(DBA)3 (11.33 mg, 0.012 mmol) was added and the mixture was heated in a sealed flask to 70 C overnight. The reaction mixture was filtered over kieselguhr, rinsed with EtOAc and the combined filtrates were concentrated under reduced pressure. The residue was purified by flash column chromatography (silica, gradient of 0.5% to 10% of [7N NH3 in MeOH] in DCM to yield 35 mg (0.193 mmol, 78%) of a yellow oil. MS(ESI) m/z=182.2 [M+1]+.

1. temperaturethe mixture was heated in a sealed flask to 70 C overnight
2. filtrationThe reaction mixture was filtered over kieselguhr
3. washrinsed with EtOAc
4. concentrationthe combined filtrates were concentrated under reduced pressure
5. customThe residue was purified by flash column chromatography (silica, gradient of 0.5% to 10% of [7N NH3 in MeOH] in DCM