ChemInform Abstract: Oligosiloxanes with Functional Groups. Part 11. Synthesis of Siloxanyl‐ and Sodium Sulfo‐propoxy‐α,α,ω‐ trihydroperfluoroalkanes.

Abstract

1991organo-silicon compounds, acyclic C derivatives organo-silicon compounds, acyclic C derivatives S 0062 -204Oligosiloxanes with Functional Groups.Part 11. Synthesis of Siloxanyl-and Sodium Sulfo-propoxy-α,α,ω-trihydroperfluoroalkanes.-The perfluoroalkylallyl ethers (III) are obtained by phase transfer catalysis of corresponding perfluoro alcohols and allyl chloride (II) as demonstrated for (IIIa). 3-Siloxanylpropylammonium halides can also be employed as a catalyst. The reaction of (III) with aqueous NaHSO3/ Na2SO3 solution gives the sulfonate derivatives (IV), from which (IVc) is an anionic fluoro surfactant. The siloxanyl derivatives (V) are obtained in 68-76% yield by Pt-catalyzed hydrosilylation of (III) using heptamethyltrisiloxane.-(SONNEK, G.; RABE, C.; SCHMAUCKS, G.; KADEN, R.; LEHMS, I.; J.