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 21 [1]. Nucleophilic substitution reactions of perfluorocyclobutene oligomers
作者:Richard D. Chambers、Graham Taylor、Richard L. Powell
DOI:10.1016/s0022-1139(00)82391-x
日期:1980.8
Reaction of perfluorocyclobutene oligomers, (1) - (4), with some simple nucleophiles gives products arising from SN2′ displacement [N.B. this term is used here to describe the overall process of addition of a nucleophile to an alkene and elimination of an allylic fluorine and is not meant to imply that the reaction is concerted] or vinylic substitution of fluorine, or a mixture of both processes. The
全氟环丁烯低聚物(1)-(4)与一些简单的亲核试剂反应,可得到由S N 2'置换产生的产物[NB该术语在此用于描述将亲核试剂添加至烯烃并消除环己烯的整个过程。烯丙基氟,并不意味着该反应是一致的]或氟的乙烯基取代,或这两种方法的混合物。二聚体(1)和(2)的反应性比无环类似物的反应性大得多,这可以归因于这些化合物中存在的环应变。
Novel derivatives of perfluorocyclobutene
作者:Richard D. Chambers、Graham Taylor、Richard L. Powell
DOI:10.1039/c39780000433
日期:——
A new trimer, as well as dimers, are formed by a reaction of perfluorocyclobutene with pyridine; the dimers with caesium fluoride give a stable carbanion.
全氟环丁烯与吡啶反应形成新的三聚体和二聚体。含氟化铯的二聚体可产生稳定的碳负离子。
Reactions involving fluoride ion. Part 17. Oligomers of perfluorocyclobutene
作者:Richard D. Chambers、Graham Taylor、Richard L. Powell
DOI:10.1039/p19800000426
日期:——
Reaction of perfuorocyclobutene (1) with fluorideion gives mainly a trimer (6) together with dimers (3) and (4) and a tetramer (7). The tetramer (7) is also obtained directly from the dimers (3) and (4). Reaction of (1) with pyridine provides a useful route to dimers (3) and (4) and a different trimer (10). The structures of these oligomers have been established and mechanisms for their formation
作者:Martin R. Bryce、Richard D. Chambers、Graham Taylor
DOI:10.1039/c39830000076
日期:——
Perfluoroalkyl groups activate double-bonds towards cycloaddition reactions with diazomethane; a novel ring expansion is described, arising from a combination of eclipsing interactions and angle-strain.