Synthesis and reactivities of 1-methyl-2-trichloromethyl-1,2-dihydroquinolines.
作者:Mitsuaki MAEDA
DOI:10.1248/cpb.38.2577
日期:——
Quaternary quinolinium salts, 1-methyl-, 1, 3-dimethyl-, and 1, 4-dimethylquinolinium iodide, react with trichloromethyl carbanion, which is generated from chloroform and sodium hydroxide in methanol, to give the 1, 2-dihydro adducts, 1-methyl-2-trichloromethyl-1, 2-dihydroquinolines. 1, 2-Dimethylquinolinium salt gives a different type of addition product and further reaction also occurs with dichlorocarbene to give a dichlorocyclopropane-fused compound under similar reaction conditions. Reduction of the 1, 2-dihydro adduct gives 1-methyl-2-trichloromethyl-1, 2, 3, 4-tetrahydroquinoline or 1-methyl-2-dichloromethyldecahydroquinoline depending on the catalyst used. These adducts are useful intermediates for synthesis of chlorine-containing heterocycles.
季
喹啉盐(1-甲基、1,3-二甲基和 1,4-二甲基
碘化
喹啉)与
氯仿和
氢氧化钠在
甲醇中生成的三
氯甲基碳离子反应,生成 1,2-二氢加合物
1-甲基-2-三氯甲基-1,2-二氢喹啉。在类似的反应条件下,1, 2-二甲基
喹啉盐会生成另一种加成产物,并与
二氯甲烷发生进一步反应,生成二
氯环丙烷融合化合物。根据所用催化剂的不同,还原 1,2-二氢加合物可得到 1-甲基-2-三
氯甲基-1,2,3,4-
四氢喹啉或 1-甲基-2-二
氯甲基
十氢喹啉。这些加合物是合成含
氯杂环的有用中间体。