APPLICATION OF FLUOROCARBETHOXY-SUBSTITUTED PHOSPHONATE: A FACILE ENTRY TO SUBSTITUTED 2-FLUORO-3-OXOESTERS
作者:Hou-Jen Tsai
DOI:10.1080/10426509708043541
日期:1997.7.1
Abstract Diethyl(fluorocarbethoxymethyl)phosphonate 1a or diisopropyl(fluorocarbethoxymethyl)phosphonate 1b, prepared from triethyl phosphite or triisopropylphosphite with ethyl bromofluoroacetate, react with n-butyllithium in THF to give the corresponding phosphonate carbanions [(RO)2P(O)CFCO2Et]−Li+ 2a (R=Et) and 2b (R=i-Pr). Addition of trimethylsilyltrifluoroacetate CF3C(O)OSiMe3 to a THF solution
Observation of a competitive path in the nucleophilic addition of fluoroolefins: The bromophilic reaction of the adduct carbanion intermediate
作者:Xi-Kui Jiang、Guo-Zhen Ji、Yi-Qun Shi
DOI:10.1016/s0022-1139(00)81976-4
日期:1987.12
products ROCF2CFBr2 (6) have been obtained in the reactions of bromotrifluoroethene(3) with different alkoxides (RO- = t-BuO-, i-PrO-, EtO- and MeO-). These products(6) are formed from a competitive path involving bromophilic reactions of the intermediate adduct carbanions(8). Radicals have been shown to be unlikely intermediates of this competitive reaction path.
817. The reactions of metallic salts of acids with halogens. Part III. Some reactions of salts of fluorohalogenoacetates and of perfluoro-acids
作者:R. N. Haszeldine
DOI:10.1039/jr9520004259
日期:——
Addition of Alcohols to Fluorinated Ethylenes
作者:ARIEH DEMIEL
DOI:10.1021/jo01076a033
日期:1960.6
SYNTHESIS OF PHENYL AND ESTER SUBSTITUTED VINYL FLUORIDES VIA REDUCTION AND OLEFINATION OF ESTERS
作者:Hou-jen Tsai、Donald J. Burton
DOI:10.1080/10426509808035739
日期:1998.9.1
A reduction-olefination sequence has been used to convert ethyl pentafluoropropanoate 6 to 1-fluoro-1-phenyl-2-pentafluoroethyl ethene 7 and ethyl 2,4,4,5,5,5-hexafluoro-2-pentenoate 8. Addition of lithium diethyl alpha -fluorobenzylphosphonate [(EtO)(2)P(O)CFPh](-) Li+ 4 or lithium fluorocarboethoxymethylene dialkylphosphonate [(RO)(2)P(O)CFCO2Et](-) Li+ 5 (R = Et, i-Pr) to a THF solution of fluorinated aldehydes prepared in situ from 6 and diisobutylaluminum hydride (DIBAL) affords the vinyl fluorides C2F5CH=CFPh 7 and C2F5CH=CFCO2Et 8 in good yields. However, yields of the final products 7 and 8 are low when in situ reduction of 6 to aldehyde was performed in the presence of lithium salts of 4 or 5.