反应详情

A solution of 4.7 grams (50 millimoles) of 4-amino-pyridine in 50 cc. of dry pyridine was treated dropwise at room temperature with a solution of 6.6 grams of 10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5-ylcarbonyl chloride (M. A. Davis, Stanley O. Winthrop, J. Steward, F. A. Sunahara and F. Herr, J. Medicin. Chem. 1963, 6, 251-5) in 50 cc of toluene. After the exothermic reaction subsided the mixture was stirred at room temperature for 4 hours and was then poured into 30 cc of water. 100 milliliters of toluene were added and the phases were separated. The toluene phase was washed once with 100 cc of water, then the combined aqueous phases were back-extracted with toluene (3×100 cc). The combined toluene solutions were dried (MgSO4) and evaporated, leaving an oily residue which was evaporated several times with further toluene and finally once with ethanol to remove residual pyridine, giving 8.45 grams of a yellow solid. This solid was crystallised from toluene (charcoal) giving off-white crystals (4.78 g, 61%), mp 145°-6°; second crop; off-white crystals (0.96 g, 12%), mp 145°-7.5°.

1. customAfter the exothermic reaction
2. customthe phases were separated
3. washThe toluene phase was washed once with 100 cc of water
4. extractionthe combined aqueous phases were back-extracted with toluene (3×100 cc)
5. dry with materialThe combined toluene solutions were dried (MgSO4)
6. customevaporated
7. customleaving an oily residue which
8. customwas evaporated several times with further toluene
9. customfinally once with ethanol to remove residual pyridine