Polyhalogenoheterocyclic compounds. Part 33. Mechanism of thermal rearrangements of perfluoropyridazine and perfluoroalkylpyridazines
作者:Richard D. Chambers、W. Kenneth R. Musgrave、Colin R. Sargent
DOI:10.1039/p19810001071
日期:——
Rearrangement of perfluoro-4,5-di-s-butylpyridazine (4) to a mixture of perfluoro-4,5-di-s-butylpyrimidine (13) and -2,5-di-s-butylpyrazine (20), occurs at 300 °C, in a sealed tube. Cross-over experiments between various fluorinated pyridazine derivatives and, also, doubly 15N-labelled derivatives, rule out any rearrangement mechanism involving a cycloaddition process. Compound (4) and other fluorinated
发生全氟-4,5-二叔丁基哒嗪(4)重排为全氟-4,5-二叔丁基嘧啶(13)和-2,5-二叔丁基哒嗪(20)的混合物在300°C的密封管中。各种氟化哒嗪衍生物与另外15种N标记的衍生物之间的交叉实验,排除了涉及环加成过程的任何重排机理。化合物(4)和其他氟化化合物充当各种氟化哒嗪衍生物的重排的促进剂,并且现在最合理地将此过程视为自由基促进的价态异构体的形成。