Platinum-Catalysed Hydrosilylation of Unsaturated Fatty Acid Esters

Abstract

Different Pt(IV), Pt(II) and Pt(0) catalysts were screened for the hydrosilylation of fatty acid esters containing terminal as well as internal double bonds. The reaction of terminally unsaturated fatty acid esters proceeded smoothly with short reaction times for nearly all examined catalysts, whereas Pt(IV) species and Pt(II) or Pt(0) species with labile ligands were sufficiently active in the reaction of internally unsaturated compounds. For methyl linoleate, a conjugation of the two internal double bonds before the hydrosilylation was observed. The reaction was carried out in substance as well as in solvent systems permitting a catalyst recycling and reuse. In these systems, however, hydrogenation and double bond isomerisation were found as side reactions.

Fatty acid-derived α,ω-bis-benzoxazines through hydrosilylation; curing and thermoset properties

“…Hydrosilylation has already been applied to unsaturated fatty acids [36][37][38][39] and has been used to prepare main chain flexible polybenzoxazines [40][41][42]. In this work, two difunctional silanes having different SiAH reactivity were used: 1,1,3,3-tetramethyldisiloxane S1 and 1,4-phenylene-bis-dimethylsilane S2 (Scheme 2).…”

Synthesis & characterization of novel silicone dendrimers as base stock for high performance lubricants

“…Herein, we report a multi-step divergent synthesis of second generation siloxane ester dendrimers by using hydrosilation [38][39][40] and esterification reactions [41][42][43]. In the present work we have carried out the hydrosilation reaction of the Si-H functional G I A and G I B dendrimers with maleic anhydride to obtained anhydride functional dendrimers G I A p and G I B p (Scheme 1).…”

The refinement of renewable resources: New important derivatives of fatty acids and glycerol

“…8. Isomeric silane adducts are formed as hydrosilylation products [26,27]. The conversions of linoleic acid methyl ester and the yields of the isomeric silyl adducts depend on the applied catalysts (Table 3).…”