Reactions of N-oxides of lepidine (1a) and 4-methyl- (1b), 4-chloro- (1c) and 6-methoxyquinoline (1d) with tosyl chloride (1 eq) and triethylamine (ca. 10 eq) in a mixture of chloroform and water at room temperature gave the corresponding di (2-quinolyl) ethers (3a-d) and N-(2-quinolyl)-2-quinolones (4a-d). The efficiency of this type of reaction depends upon the nature and position of the substituents. Whereas the reaction of 1c with carbostyril under the same conditions gave small amounts of 4-chloro-2-tosyloxyquinoline (2c) and N-(4-chloro-2-quinolyl)-4-chloro-2-quinolone (4c), that of 1d afforded 6-methoxy-2-quinolyl 2'-quinolyl ether (15) and N-(6-methoxy-2-quinolyl)-2-quinolone (16) in 47 and 29% yields, respectively.
脂肪噻嗪氧化物(1a)与4-
甲基(1b)、4-
氯(1c)和
6-甲氧基喹啉(1d)在室温下与
对甲苯磺酰氯(1当量)和
三乙胺(约10当量)在
氯仿和
水的混合物中反应,得到了相应的二(2-
喹啉基)醚(3a-d)和N-(2-
喹啉基)-2-
喹啉酮(4a-d)。这类反应的效率依赖于取代基的性质和位置。尽管在相同条件下,1c与
碳基
乙烯基的反应仅得到少量的4-
氯-2-对
甲苯磺酰
氧基
喹啉(2c)和N-(4-
氯-2-
喹啉基)-4-
氯-2-
喹啉酮(4c),但1d的反应则分别获得了6-甲
氧基-2-
喹啉基-2'-
喹啉醚(15)和N-(6-甲
氧基-2-
喹啉基)-2-
喹啉酮(16),产率为47%和29%。