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- W2376703592 abstract "Tetrafluoroethylene pentamer (1) reacted with sulfamic acid in DMF atreflux temperature to yield a mixture of derivatives of oligomer,in which N,N-dimeth-ylamine ketimine group was introduced into the molecules of 2a and 2b.It is suggestedthat the mechanism of their formation were via the solvolysis of DMF.Ketenimine (3a) and azetidine (4a) were obtained quantitatively by the reaction of1 with n-butylamine in the presence of triethylamine or pyridine in ether at r.m..The ratio of 3a:4a was 1:1.1.Under similar conditions ketenimine (3b) and substitutedazetidine (4b) were formed by reaction of 1 with γ-aminopropyltriethoxy silane (KH-550),3b:4b=1:1.3.SiF and SiF_2 bonds were observed in ~(19)F and ~(29)Si NMR spectra.The formation of silicon-fluorine bond was related with the amount of tertiary aminepresent in the reaction.Seven-membered cyclic compound (5) was produced by reaction of 1 with ethanol-amine,the yield of 5 was higher than the tetramer of tetrafluoroethylene,showing thatthe reactivity of pentamer is higher than tetramer.The experimental results showed that the more electronegativity of substitute groupR attached to aminogroup,the less nucleophilicity of amino group was.The reactivitysequence of aliphatic amines was n-butylamine,KH-550 ethanolamine sulfamicacid." @default.
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- W2376703592 date "1987-01-01" @default.
- W2376703592 modified "2023-09-25" @default.
- W2376703592 title "Study on the Reaction of Tetrafluoroethylene Pentamer with Primary Amine" @default.
- W2376703592 hasPublicationYear "1987" @default.
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