Polyhalogenoaromatic compounds. Part VIII. Reaction of aryl-lithium compounds with tetrachloro-4-methoxypyridine, and of aryl-substituted polychloropyridines with n-butyl-lithium
作者:J. D. Cook、B. J. Wakefield
DOI:10.1039/j39690002376
日期:——
dines gave the corresponding 4-aryltrichloro-3-pyridyl-lithium compounds. Attempts to trap 2-pyridynes generated by elimination of lithium chloride from the 3-pyridyl-lithium compounds were largely unsuccessful; with furan, the main products were the 4-aryl-2,3,6-trichloropyridines, but with trichloro-4-phenyl-3-pyridyl-lithium, a small amount of 2,3-dichloro-5,8-epoxy-5,8-dihydro-4-phenylquinoline
苯基锂与四氯-4-甲氧基吡啶的反应依次得到四氯-4-苯基吡啶,三氯-4,6-二苯基吡啶和二氯-2,4,6-三苯基吡啶;在温和的条件下,对甲氧基苯基锂,对二甲氨基苯基锂和p-三氟甲基苯基锂得到相应的4-芳基四氯吡啶。用正丁基锂,4-芳基-四氯吡啶得到相应的4-芳基三氯-3-吡啶基-锂化合物。试图从3-吡啶基-锂化合物中除去氯化锂而捕获2-吡啶基的尝试在很大程度上是失败的。含呋喃,主要产物为4-芳基-2,3,6-三氯吡啶,但含三氯-4-苯基-3-吡啶基-锂,少量为2,3-二氯-5,8-环氧-得到5,8-二氢-4-苯基喹啉。