Molecular modification of anpirtoline (2a) is described. Several methods of preparation of 4-[(3-chlorophenyl)sulfanyl]-1-methylpiperidine (3a) and its demethylation led to the deazaanpirtoline (3c). Nucleophilic substitution of piperidine-4-thiole with 2-chloro-4-nitropyridine, 2,4-dichloro-6-methylpyridine, and 3,6-dichloropyridazine led to 2-chloro-4-(piperidin-4-ylsulfanyl)pyridine (6), 4-chloro-6-methyl-2-(piperidin-4-ylsulfanyl)pyridine (7), and 3-chloro-6-(piperidin-4-ylsulfanyl)pyridazine (8), respectively. 2-Chloro-6-(pyridin-4-ylsulfanyl)pyridine (10) and 4-[(2-chloropyridin-6-yl)sulfanyl]quinoline (11) were obtained from sodium 2-chloropyridine-6-thiolate. Homoanpirtoline analogs with methylene group inserted between the pyridine moiety and the sulfur atom (compound 12b) as well as between the sulfur atom and the piperidine ring (compound 13b) were also prepared.
描述了对anpirtoline(2a)的分子修饰。通过多种方法制备了4-[(3-氯苯基)硫基]-1-甲基哌啶(3a),以及其去甲基化产物deazaanpirtoline(3c)。哌啶-4-硫醇与2-氯-4-硝基吡啶、2,4-二氯-6-甲基吡啶和3,6-二氯吡啉的亲核取代反应分别得到了2-氯-4-(哌啶-4-基硫基)吡啶(6)、4-氯-6-甲基-2-(哌啶-4-基硫基)吡啶(7)和3-氯-6-(哌啶-4-基硫基)吡啉(8)。从氯化钠2-氯吡啶-6-硫酸盐得到了2-氯-6-(吡啶-4-基硫基)吡啶(10)和4-[(2-氯吡啶-6-基)硫基]喹啉(11)。还制备了在吡啶基团与硫原子之间插入亚甲基基团(化合物12b)以及在硫原子与哌啶环之间插入亚甲基基团(化合物13b)的Homoanpirtoline类似物。