p-Toluenesulfonic acid → Acrylic acid 3,3,4,4-tetrafluoro-4-heptafluoropropyloxy-butyl ester

참여 물질

반응 단계

Acrylic acid was esterified with 2-[2-(heptafluoropropoxy)-tetrafluoroethyl]-ethyl alcohol (US 2008113199 A1) in the presence catalytic amounts of p-toluene sulfonic acid to yield acrylic acid 3,3,4,4-tetrafluoro-4-heptafluoropropyloxy-butyl ester quantitatively. The ester was washed with water and distilled prior to the reaction with APTES (Aminopropyl triethoxysilane, CAS#919-30-2). A solution of one equivalent of APTES and two equivalents acrylic acid 3,3,4,4-tetrafluoro-4-heptafluoropropyloxy-butyl in absolute ethanol were allowed to stir at 60° C. for 5 h. The solvent was distilled of under reduced pressure to provide the desired twin-tail silane (tertiary amine fluorosilane) quantitatively as a colorless oil.

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