反应详情

A 100 mL benzene suspension of 3.1 g (5.6 mmol) N,N-diethyl-4-[(8-methyl-8-azabicyclo[3.2.1]oct-3-ylidene)phenylmethyl]benzamide, 3.45 g (25 mmol) K2CO3, and 1.5 mL (10 mmol) 2,2,2-trichloroethyl chloroformate was allowed to reflux for 2 h. The reaction was cooled, filtered, and the solvent evaporated. The residual oil was dissolved in MeOH then stirred at reflux with 2.6 g (40 mmol) zinc powder for 1 h. After cooling, the reaction was filtered through celite and partitioned between 3N NaOH and CH2Cl2. The organic layer was washed with brine, dried over K2CO3, filtered, and concentrated (2.1 g, 5.6 mmol). The resulting clear oil was dissolved in Et2O, filtered, and the product precipitated after the addition of ethereal HCl; mp 128-132° C. MS m/z (MH+) 375. 1H NMR 300 MHz (DMSO-d6) δ 7.15-7.4 (m, 9H), 3.9-4.0 (m, 2H), 3.15-3.3 (m, 2H), 2.55-2.65 (m, 2H), 2.25-2.35 (m, 4H), 1.9-2.0 (m, 2H), 1.75-1.85 (m, 2H), 1.0-1.2 (m, 6H). Anal calc C25H30N2O.HCl (3% H2O): C, 70.89; H, 7.71; N, 6.61. Found: C, 70.52; H, 7.41; N, 6.24.

1. temperatureto reflux for 2 h
2. temperatureThe reaction was cooled
3. filtrationfiltered
4. customthe solvent evaporated
5. dissolutionThe residual oil was dissolved in MeOH
6. temperatureAfter cooling
7. filtrationthe reaction was filtered through celite
8. custompartitioned between 3N NaOH and CH2Cl2
9. washThe organic layer was washed with brine
10. dry with materialdried over K2CO3
11. filtrationfiltered
12. concentrationconcentrated (2.1 g, 5.6 mmol)
13. dissolutionThe resulting clear oil was dissolved in Et2O
14. filtrationfiltered
15. customthe product precipitated
16. additionafter the addition of ethereal HCl