The design of industrial products based on bioresources is a challenging issue. Modification of starch, by hydrophobic chemical substituents, results in an innovative hydrophobic material. Herein, the hydrophobic part of the derivative, comprised of octadienyl chains, is introduced through catalytic butadiene telomerization. The process is efficiently conducted on starch in its granular form in an aqueous medium using hydrosoluble palladium complexes. After optimization, a turnover number (TON) of up to 550 was achieved in the presence of [(pi-allyl)PdCl](2) catalyst and, unusually, by using dimethylisosorbide as a cosolvent.

Mesnager, Julien Quettier, Claude Lambin, Anne Rataboul, Franck Perrard, Alain Pinel, CatherineNowadays, the preparation of bio-based polymers remains a challenging issue. The modification of starch by hydrophobic chemical substitutions results in an innovative material. We introduced the hydrophobic part of the derivative via catalytic butadiene telomerization using exclusively water as solvent in the presence of surfactants. In this paper, we describe the influence of the nature of the surfactant on the reaction, CTAB (cetyltrimethylammonium bromide) giving the best reactivity. Moreover, some physicochemical properties of modified starches are evaluated showing their hydrophobic behaviours

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Mesnager, Julien Lambin, Anne Quettier, Claude Rataboul, Franck Pinel, CatherineThe synthesis of hydrophobic starch was performed via palladium-catalyzed telomerization of butadiene with native starch. This reaction is efficiently performed in water in the presence of neutral or cationic surfactant with high HLB. After optimization of the reaction conditions, TOF up to 446 was achieved