Manufacture of polyene aldehydes

Details Manufacture of polyene aldehydes Manufacture of polyene aldehydes

C - Chemistry, Metallurgy

07

C

C07C 403/14 (2006.01) C07C 45/59 (2006.01) C07C 45/67 (2006.01) C07C 47/21 (2006.01) C07D 317/12 (2006.01) C07D 317/18 (2006.01) C07D 317/22 (2006.01) C07D 407/12 (2006.01) C07F 7/18 (2006.01)

Patent

CA 2254507

A process for the manufacture of polyene aldehydes comprises reacting a polyene O,O-ethylene acetal with a 1-alkoxy-1,3-diene in the presence of a Lewis acid or Brönsted acid, hydrolyzing the resulting condensation product and cleaving off alcohol under basic or acidic conditions from the polyene derivative produced at this stage. The novel polyene O,O-ethylene acetals as well as the likewise novel condensation products in this process form further aspects of the invention. The final products are primarily carotenoids which find corresponding use, e.g. as colorants and pigments for foodstuffs, animal products etc.

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