Limitations of the Wittig–Horner-type annulation of fluorobutenolide moiety to 3-hydroxyquinoline-2,4(2H,3H)-diones. Novel modifications of the Perkow reaction including fluorinated acyloxy leaving groups
3-(Fluoroacyloxy)quinoline-2,4(1H,3H)-diones react with triethyl phosphite to afford either the product of the Perkow reaction or the corresponding 4-ethoxyquinolin-2(1H)-one. In both reactions, the fluorocarboxylate anion acts as the leaving group. For the corresponding 3-(fluoroiodoacetoxy) derivative this observation precludes the application of the intramolecular Wittig–Horner synthesis to modify
Synthese de materiaux polymeres transparents. Partie I Synthese du trifluoroacrylate de trideuteromethyle
作者:B. Boutevin、Y. Pietrasanta、A. Rousseau、D. Bosc
DOI:10.1016/s0022-1139(00)82012-6
日期:1987.11
The acrylic ester F2CCFCO2CD3 is prepared from a mixture of difluorotetrachloroethanes CFCI2CFCI2 and CF2CICCI. The dehalogenation of these Freons, followed by the addition of CFCI3 by means of AICI3 leads to a mixture of chlorofluoropropanes. The hydrolysis with oleum gives the acid chlorides which are then esterified by CD3OD. The dehalogenation of the mixture by the zinc stirred in oxalic acid
丙烯酸酯F 2 C = CF = CO 2 CD 3由二氟四氯乙烷CFCI 2 = CFCl 2和CF 2 CI = CCI的混合物制备。这些氟利昂的脱卤,接着加入CFCI的3通过AICI的手段3所导致氯氟丙烷的混合物。用发烟硫酸水解得到酰氯,然后将其用CD 3 OD酯化。通过在草酸中搅拌的锌使混合物脱卤,能够通过蒸馏分离预期的酯。该化合物的折射率为n 20 D= 1.3667在0.6和1.4μm之间的近红外光中没有显示出主要吸收。因此,相应的聚合物可能为光纤的芯提供良好的材料。
Copolymers of polyhalogenated isocyanates
申请人:E. I. Du Pont de Nemours and Company
公开号:US03943112A1
公开(公告)日:1976-03-09
Disclosed herein are polyhalogenated isocyanates (intermediates for polyfluorinated vinyl isocyanates); polyfluorinated vinyl isocyanates, process therefor, and homopolymers and copolymers thereof; and use of said polyfluorinated vinyl isocyanate homopolymers and copolymers as water and oil repelling agents for cloth and paper.
Disclosed herein are polyhalogenated isocyanates (intermediates for polyfluorinated vinyl isocyanates); polyfluorinated vinyl isocyanates, process therefor, and homopolymers and copolymers thereof; and use of said polyfluorinated vinyl isocyanate homopolymers and copolymers as water and oil repelling agents for cloth and paper.