作者:T. Takakura、M. Yamabe、M. Kato
DOI:10.1016/s0022-1139(00)81542-0
日期:1988.11
In order to obtain fluorinated difunctional monomers for fluoropolyurethanes, we synthesized novel fluorinated aliphatic diisocyanates [OCNCH2(CFc2)nCH2NCO] from corresponding diols [HOCH2CH2(CF2)nCH2CH2OH]. Oxidation of the diols with chromium trioxide-sulfuric acid gave α, α, ω, ω-tetrahydroperfluoroalkylene dicarboxylic acids in high yields. Then treating the acids with phosphorus pentachloride
为了获得用于氟聚氨酯的氟化双官能单体,我们从相应的二醇[HOCH 2 CH 2(CF 2)n CH 2 CH 2 OH]合成了新型氟化脂肪族二异氰酸酯[OCNCH 2(CF c2)n CH 2 NCO ]。用三氧化铬-硫酸将二醇氧化,得到高产率的α,α,ω,ω-四氢全氟亚烷基二羧酸。然后用五氯化磷处理酸,得到相应的二羧基氯化物,其易于与肼酸-吡啶配合物转化为二羧基叠氮化物。最后,在叠氮化物的库尔修斯重排上,从起始二醇得到的终产物α,α,ω,ω-四氢全氟亚烷基二异氰酸酯的产率为53%(n = 4)和19%(n = 6)。