反应详情

Diethyl 2-aminononanedioate (5.0 g) was heated with benzaldehyde (2.15 g) in benzene (10 ml) under reflux for 12/3 hr, removing the water formed by means of a Dean and Stark apparatus. The benzene was evaporated in vacuo and the residual oil was taken up in dry tetrahydrofuran (20 ml), stirred under dry nitrogen, treated with sodium hydride (0.61 g of a 80% dispersion in mineral oil), and heated until evolution of hydrogen began. Thereafter reaction was allowed to procede at room temperature. When effervescence had ceased, the pale yellow-brown solution was cooled in ice-water and, with continued stirring, treated with methyl iodide (6.83 g); the cooling bath was removed after 15 min and the mixture was set aside at room temperature overnight. The resulting suspension of solid was diluted with ether (100 ml) and shaken with ice-cold water (100 ml), and the ethereal phase was washed with H2O, dried over sodium sulphate, and evaporated, to leave crude diethyl 2-(benzylideneamino)-2-methylnonanedioate (6.4 g) as a yellow oil.

1. temperatureunder reflux for 12/3 hr
2. customremoving the water
3. customformed by means of a Dean and Stark apparatus
4. customThe benzene was evaporated in vacuo
5. additiontreated with sodium hydride (0.61 g of a 80% dispersion in mineral oil), and
6. temperatureheated until evolution of hydrogen
7. customThereafter reaction
8. customto procede at room temperature
9. customthe cooling bath was removed after 15 min
10. additionThe resulting suspension of solid
11. additionwas diluted with ether (100 ml)
12. stirringshaken with ice-cold water (100 ml)
13. washthe ethereal phase was washed with H2O
14. dry with materialdried over sodium sulphate
15. customevaporated