Reactions involving fluoride ion. Part 31. Co-oligomers of perfluoro-1-methyl-1,3-diazacyclopent-2- and -3-ene
作者:Robert N. Barnes、Richard D. Chambers、Christopher D. Hewitt、Michael J. Silvester、Erich Klauke
DOI:10.1039/p19850000053
日期:——
The fluoride ion-induced co-oligomerisations of perfluoro-1-methyl-1,3-diazacyclopent-2-and -3-ene (1) with hexafluoropropene and perfluoro-cyclobutene, -cyclopentene, and -cyclohexene are reported. Comparisons are made between these reactions of nitrogen anions and the corresponding chemistry of fluorinated carbanions.
Reactions involving fluoride ion. Part 33 [1]. Perfluoroaza-alkylation of fluorinated heteroaromatics with perfluoro-1-methyl-1,3-diazacyclopent-2-and -3-ene
(1), generated by reaction of fluorideion with (2), can be trapped by fluorinated heteroaromatics. Reaction of (1) with pentafluoropyridine gives a mono-substituted product. Mono- and di-substituted products are obtained with tetrafluoro-pyridazine and -pyrimidine, and fluorideion catalysed isomerisation is observed. The mechanistic consequences of this are discussed. Reaction of (1) with trifluoro-1
A variety of dimers is formed by reaction of perfluoro-2,5-diazahexa- 2,4-diene (2) with metal fluorides; product composition depends on the reactivity of the fluoride source and the reaction conditions i.e. product may be under kinetic or equilibrium control. Cyclisation of (2) occurs, over hot caesium fluoride, in a flow process. A nitranion, generated by fluoride ion, has been trapped with iodomethane