אסיף מאגר המחקר החקלאי

The synthesis and the mass and nuclear magnetic resonance spectra of side chain isomers of cholesta-5,22-dien-3β-ol and cholesta-5,22,24-trien-3β-ol

Year:

1970

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Volume :

15

Co-Authors:

Hutchins, R.F.N., Insect Physiology Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Beltsville, MD 20705, United States
Thompson, M.J., Insect Physiology Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Beltsville, MD 20705, United States
Svoboda, J.A., Insect Physiology Laboratory, Agricultural Research Service, U. S. Department of Agriculture, Beltsville, MD 20705, United States

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Abstract:

The previously unknown 22-cis-cholesta-5,22-dien-3β-ol, 22-cis and 22-trans isomers of cholesta-5,22,24-trien-3β-ol, 20-iso-22-trans-cholesta-5,22,24-trien-3β-ol, 22,24-trans,trans-26-homocholesta-5,22,24-trien-3β-ol, and the known 22-trans-dehydrocholesterol were synthesized. Their infrared, mass and nuclear magnetic resonance spectra are presented. These compounds undergo fragmentation processes that are governed primarily by the site of the unsaturation and not by their stereochemistry. However, the C-methyl resonances in the nuclear magnetic resonance spectra are influenced by their chemical environment. © 1969 Holden-Day, Inc.

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