Manufacture of polyene aldehydes

Details Manufacture of polyene aldehydes Manufacture of polyene aldehydes

1998-11-17

2000-11-28

Padmanabhan, Sreeni

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549221, 549361, 568447, 568449, C07D31708

Patent

active

061537691

ABSTRACT:
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 Bronsted 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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