反应详情

To a suspension of methyl isonicotinate (96.0 g, 0.7 mol) and sodium methoxide (45.4 g, 0.84 mol) in ethyl ether (1 l), acetone (81.3 g, 1.4 mol) was added dropwise at 25°~30° C. and stirring was continued for 2 hrs. under reflux. After cooling, acetic acid (50.4 g, 0.84 mol) was added to the reaction mixture, the organic layer was separated, washed twice with H2O, dried over anhydrous MgSO4 and evaporated. The residue (87.5 g) was distilled under reduced pressure to give the title compound as a pale yellow oil which solidified in the refrigerator; yield: 40.2 g; bp 135°~138° C./10 mmHg; mp 62°~64.5° C. (Lit. bp 118°~120° C.; mp 66.5°~67° C.; R. Levine, J. K. Sneed, J. Am. Chem. Soc., 73, 5614 (1951).). ##STR30##

1. additionwas added dropwise at 25°~30° C.
2. temperatureunder reflux
3. temperatureAfter cooling
4. customthe organic layer was separated
5. washwashed twice with H2O
6. dry with materialdried over anhydrous MgSO4
7. customevaporated
8. distillationThe residue (87.5 g) was distilled under reduced pressure