Formation and reactions of carbanions from α-substituted perfluoroacyl fluorides
作者:L.S. Chen、K.C. Eapen
DOI:10.1016/s0022-1139(00)81257-9
日期:1991.11
acetonitrile with alkali metal fluorides. Other products identified in hydrolyzed reaction mixtures include perfluoroolefins and monohydroperfluoro compounds. A mechanism involving the formation of a carbanion intermediate is proposed. Evidence for the formation of carbanions has been obtained by carrying out the reaction in the presence of bromine and also in the presence of other substrates.
Fluoro-ketones. II Reactions of fluorocarbon grignards and copper compounds with perfluoroalkylacid fluorides
作者:H. Gopal、C. Tamborski
DOI:10.1016/s0022-1139(00)82083-7
日期:1979.4
The reactions between C6F5MgBr (I), p-BrC6F4MgBr (X), C6F5Cu (XXI), p-HC6F4Cu (XXII) and p-BrC6F4Cu (XV) with primary and secondary perfluoroalkylether acid fluorides were studied. The Grignard compounds react very slowly with the secondary acid halides (RfCF(CF3C(O)F) whereby competing reactions cause undesirable by-products and reduction of ketone yields. Primary acid halides (RfCF2C(O)F) react much
C 6 F 5 MgBr(I),p-BrC 6 F 4 MgBr(X),C 6 F 5 Cu(XXI),p-HC 6 F 4 Cu(XXII)和p-BrC 6 F 4 Cu之间的反应(XV)与伯和仲全氟烷基醚酰氟进行了研究。格利雅化合物反应非常缓慢地与次级酰卤(R ˚F CF(CF 3 C(O)F),由此竞争反应导致不期望的副产物和还原酮产率。初级酰卤(R ˚F CF 2 C(O) F)与C 6 F 5反应更快用MgBr可以提高酮的收率。有机铜化合物可与伯酰卤或仲酰卤反应,以优异的收率得到酮,而不会从竞争的二次反应中形成副产物。溶剂,有机金属试剂的类型以及伯氟酸与仲氟酸的关系是影响产品收率和产品分布的变量。