反应详情

To a cold (ice bath) stirred solution of 2-(tert-butoxycarbonylamino)-4,6-dichloro-5-methoxybenzoic acid (2.0 g, 5.9 mM) in 20 mL of dry dimethylformamide under a nitrogen atmosphere was added sodium hydride (0.24 g, 5.9 mM); a precipitate formed which slowly redissolved on stirring. To the resulting stirred solution was added iodomethane (8.4 g, 59 mM). After stirring at room temperature for 1.5 hr, the reaction mixture was poured into water and the resulting mixture extracted with ether. The combined ether extracts were washed with brine, dried (MgSO4), filtered and concentrated to leave the title compound as a yellow oil (2.0 g, 96%); MS(CI): 350 (M+H).

1. customa precipitate formed which
2. dissolutionslowly redissolved
3. stirringTo the resulting stirred solution
4. stirringAfter stirring at room temperature for 1.5 hr
5. extractionthe resulting mixture extracted with ether
6. washThe combined ether extracts were washed with brine
7. dry with materialdried (MgSO4)
8. filtrationfiltered
9. concentrationconcentrated