Reactions of halogenomethanes in the vapour phase. Part 4. The reactions of imidazoles with chloroform at 550 °C, and a comparison with their liquid-phase reactions with trichloroacetate ion or hexachloroacetone and base
作者:Reginald E. Busby、Mohammad A. Khan、Mohammad R. Khan、John Parrick、C. J. Granville Shaw、Mohammad Iqbal
DOI:10.1039/p19800001427
日期:——
1-Unsubstituted imidazoles and chloroform at 550 °C in a flow system give mainly 5-chloropyrimidines, together with 4-chloropyrimidines and chloropyrazines. The effects of methyl substituents on the ratio of products is considered. The liquid-phase reactions of 2-methyl- and 2,4,5-trimethyl-imidazole under conditions in which dichlorocarbene is said to be formed in basic or neutral conditions were
1-未取代的咪唑和氯仿在550°C的流动系统中主要生成5-氯嘧啶,4-氯嘧啶和氯吡嗪。考虑了甲基取代基对产物比例的影响。研究了在碱性或中性条件下形成二氯卡宾的条件下的2-甲基-和2,4,5-三甲基-咪唑的液相反应,并与氯仿的气相反应进行了比较。