Efficient syntheses of C 20-carotene and crocetin (descrocetin) esters promoted by an acidic ionic liquid

GV Kryshtal, GM Zhdankina, NV Ignat'ev, M Schulte…

Index: Kryshtal, Galina V.; Zhdankina, Galina M.; Zlotin, Sergei G.; Ignat'Ev, Nikolai V.; Schulte, Michael Tetrahedron Letters, 2012 , vol. 53, # 37 p. 4971 - 4973,3

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Citation Number: 6

Abstract

Efficient syntheses of C20-carotene and crocetin or descrocetin esters from fumaraldehyde bis-dimethylacetal are described. The key steps of these syntheses are the reactions of fumaraldehyde and (2E, 4E, 6E)-octa-2, 4, 6-trienedial bis-dimethylacetals with alkyl vinyl or alkyl propenyl ethers promoted by the acidic ionic liquid,[emim][HSO4].