The reactions of some halogenated pyridines with methoxide and methanethiolate ions in dimethylformamide
作者:Lorenzo Testaferri、Marcello Tiecco、Marco Tingoli、Donatella Bartoli、Alberto Massoli
DOI:10.1016/s0040-4020(01)96539-1
日期:1985.1
The reactions of 2,6- and 2,5-dibromopyridines and of 2,3- and 3,5-dichloropyridines with sodium isopropanethiolate and methanethiolate afforded the products of mono- or of bis-substitution depending on the experimental conditions. The same pyridines reacted with sodium methoxide to give good yields of the mono-substituted products; bis-substitution occurred easily only in the case of the 2,6-dibromo-
2,6-和2,5-二溴吡啶和2,3-和3,5-二氯吡啶与异丙硫醇钠和甲硫醇钠的反应根据实验条件提供单取代或双取代的产物。相同的吡啶与甲醇钠反应,得到良好收率的单取代产物。仅在2,6-二溴-和3,5-二氯吡啶中容易发生双取代。还描述了从卤代甲氧基吡啶或卤代硫代甲氧基吡啶开始的一些甲氧基硫代甲氧基吡啶的合成。双(烷硫基)吡啶可被HMPA中的钠裂解,得到双(巯基)吡啶。