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Studies on vitamin d and related compounds. XVIII: An investigation into the interconversion of precalciferol and calciferol and of analogous compounds

✍ Scribed by J. L. M. A. Schlatmann; J. Pot; E. Havinga


Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
508 KB
Volume
83
Category
Article
ISSN
0165-0513

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πŸ“œ SIMILAR VOLUMES


Studies on vitamin D and related compoun
✍ J. L. M. A. Schlatmann; E. Havinga πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 693 KB

## Abstract The syntheses are described of previtamin D ‐ and vitamin D analogues to be used for the study of the thermal precalciferol ⇋ calciferol isomerization reaction. A previtamin D analogue (4) prepared as indicated by Inhoffen could not be obtained in a pure state. Closer inspection reveal

Studies on vitamin D and related compoun
✍ A. Verloop; A. L. Koevoet; R. van Moorselaar; E. Havinga πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 393 KB

## Abstract Details on the iodine‐catalyzed reactions of previtamin D, tachysterol, __cis‐__ and __trans__‐vitamin D (influence of solvent, concentration, wavelength of light) are given. The possibility of a previtamin D determination based on the __cis/trans__ isomerisation is indicated. Some resu

Investigations on sterols XIV studies on
✍ M. P. Rappoldt πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 328 KB

## Abstract Kinetic experiments on the isomerization of lumisterol~2~ under the influence of ultraviolet light of various wavelengths are reported. The experiments indicate that neither tachysterol~2~ nor ergosterol are primary reaction products of lumisterol~2~. Lumisterol~2~ is exclusively conver

Studies on vitamin D and related compoun
✍ A. Verloop; G. J. B. Corts; E. Havinga πŸ“‚ Article πŸ“… 2010 πŸ› Elsevier Science 🌐 English βš– 516 KB

## Abstract The photochemical conversion of isotachysterol~2~ (in ether) has been studied; the effects of wave‐length and time of irradiation on the composition of the irradiation mixture are discussed. On chromatography of the crude irradiation product a compound was obtained in a pure, non‐crysta