Reactions involving fluoride ion. Part 18. Derivatives of perfluorocycloalkenes
作者:Richard D. Chambers、Graham Taylor、Richard L. Powell
DOI:10.1039/p19800000429
日期:——
Unlike perfluorocyclobutene, perfluorocyclo-pentene and -hexene do not form oligomers with pyridine. A range of oligomers is obtained from mixtures of perfluorocycloalkenes in reactions initiated by caesium fluoride. Products are also obtained from perfluorocycloalkenes with perfluoropropene and between perfluorocyclobutene and perfluorobut-2-ene. A variation is observed in the balance between exo-
Reactions involving fluoride ion. Part 19. Observable perfluorocycloalkylanions
作者:Richard D. Chambers、Raymond S. Matthews、Graham Taylor、Richard L. Powell
DOI:10.1039/p19800000435
日期:——
Carbanions are generated by reaction of fluorideion with perfluorocycloalkene derivatives, e.g. perfluorobicyclobutylidene (3), and this anion is relatively unchanged over a range of temperature or on prolonged standing, as indicated by the 19F n.m.r. spectrum. Internal return by fluorideion to the same carbon atom is suggested to account for the 19F n.m.r. spectra of the ions. Trapping experiments
碳离子是通过氟离子与全氟环烯烃衍生物(例如)反应生成的。全氟双环丁烯(3),并且该阴离子在一定温度范围内或长时间放置后相对不变,如19 F nmr光谱所示。建议通过氟离子内部返回相同的碳原子来解释离子的19 F nmr光谱。用溴和氯进行的捕集实验为离子的结构提供了进一步的证据。
Photochemically-induced 1,3-fluorine shifts. The synthesis of novel fluorinated spiro compounds
作者:Martin R. Bryce、Richard D. Chambers、Graham Taylor
DOI:10.1039/c39830001457
日期:——
The perfluorocyclobutenederivative (8) undergoes a photochemically-induced 1,3-fluorine shift followed by keletal rearrangement; the preparation of novel spiro compounds is described.
A novel annelation process involving perfluorocycloalkene derivatives
作者:Richard D. Chambers、Stewart R. Korn、Graham Sandford
DOI:10.1039/c39930000856
日期:——
N,N-Dimethylaniline and N-methylindole react as nucleophiles through carbon with perfluorobicyclobutylidene 1, to give the unusual products 5a and 5b; Proton Sponge reacts in an analgous way with the systems 2 and 3 but, in this case, give the novel annelated products 8 and 7.