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Published September 20, 1953 | public
Journal Article

Conversion of Dehydro-β-carotene, via its Boron Trifluoride Complex, into an Isomer of Cryptoxanthin


Dehydro-β-carotene and BF_3-etherate form a dark blue complex. Cleavage with water (or methanol) resulted in the isolation of a monohydroxy-β-carotene, termed isocryptoxanthin (or its methyl ether). Isocryptoxanthin when treated with acid chloroform undergoes dehydration to yield dehydro-β-carotene which indicates the presence of an allylic hydroxyl group. While naturally occurring cryptoxanthin is 3-hydroxy-β-carotene, isocryptoxanthin is the corresponding 4-compound. Its methyl ether or acetate can also be converted into dehydro-β-carotene.

Additional Information

© 1953 American Chemical Society. Received April 17, 1953. Presented at the Meeting of the American Chemical Society, March 19, 1953, in Los Angeles, California. The authors wish to thank Dr. A. J. Haagen-Smit, Mr. G. Swinehart and Dr. A. Elek for microanalyses.

Additional details

August 19, 2023
October 19, 2023