反应详情

4,6-Dichloro-pyrimidine (6 g, 0.04 mol) (Ranganathan, Subramania et al., Proceedings—Indian Academy of Sciences, Chemical Sciences (1994), 106(5), 1051-70. Maggieli, C. et al., Farmaco, Edizione Scientifica (1988), 43(3), 277-91. Gershon, Herman et al., Journal of Med. Chem. (1963), 6, 87-9) and (2-methoxy-phenyl)-boronic acid (4.37 g, 0.029 mol) were dissolved in dimethoxyethane (120 mL) and water (18 mL). To this solution were added NaHCO3 (6.72 g, 0.08 mol), PdCl2(PPh3)2 (0.84 g) and allowed to reflux for 7 his (TLC control). Then the mixture was cooled down to room temperature and the solvents removed under reduced pressure. The obtained crude solid was dissolved in dichloromethane (100 mL), washed with water (1×100 mL), the organic layer was separated, dried over K2CO3, filtered and the solvent removed under reduced pressure. The obtained solid was further purified by flash-chromatography (eluent dichloromethane) to afford a crude product that was crystallized from hexane to yield 2-chloro-4-(2-methoxy-phenyl)-pyrimidine (4.7 g, 73%).

1. temperatureto reflux for 7 his (TLC control)
2. customthe solvents removed under reduced pressure
3. customThe obtained crude solid
4. washwashed with water (1×100 mL)
5. customthe organic layer was separated
6. dry with materialdried over K2CO3
7. filtrationfiltered
8. customthe solvent removed under reduced pressure
9. customThe obtained solid was further purified by flash-chromatography (eluent dichloromethane)
10. customto afford a crude product that
11. customwas crystallized from hexane