Hydroesterification of METHYL 10-UNDECENOATE (cas 111-81-9) in thermomorphic multicomponent solvent systems—Process development for the synthesis of sustainable polymer precursors

Add time:08/24/2019    Source:sciencedirect.com

In this paper, we present a process concept for the atom economic hydroesterification of renewable METHYL 10-UNDECENOATE (cas 111-81-9) in thermomorphic multicomponent solvent (TMS) systems. Resulting dimethyl dodecanedioate is a polymer building block used e.g. in Nylon 6,12. As a suitable recycling technique a thermomorphic multicomponent solvent system consisting of methanol and dodecane is employed to recycle the palladium/1,2-bis(di-tert-butylphosphino)methyl)benzene/methanesulfonic acid catalyst. Product yields up to 79% and a high regioselectivtiy of 94% to the linear product are obtained. Low leaching of the catalyst into the product phase with 1% in respect of palladium and phosphorous is observed. Robustness and stability of the catalyst is shown in eight recycling runs without any loss of selectivity in the reaction.

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