反应详情

Glacial acetic acid (1.2 ml, 20 mmol) was added dropwise to a stirred solution of 5,6-dihydroquinoline (1.31 g, 10 mmol) and aniline (1.86 g, 20 mmol) in methanol (4 ml). The solution was heated under reflux for 21h, cooled to room temperature, poured onto a mixture of saturated aqueous sodium chloride (25 ml) and water (25 ml), and the mixture was basified with 10N-NaOH and extracted with ether (3×25 ml). The extracts were concentrated in vacuo to give a dark orange oil which was chromatographed [alumina; ethyl acetate-toluene (1:24 to 1:4)] to give a solid. Recrystallisation from di-isopropyl ether gave the product (1.50 g), mp 102°-103°. (Found: C, 80.4; H, 76.2; N, 12.5. C15H16N2 requires C, 80.3; H, 7.2; N, 12.5%)

1. temperatureThe solution was heated
2. extractionextracted with ether (3×25 ml)
3. concentrationThe extracts were concentrated in vacuo
4. customto give a dark orange oil which
5. customwas chromatographed [alumina; ethyl acetate-toluene (1:24 to 1:4)]
6. customto give a solid
7. customRecrystallisation from di-isopropyl ether