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Investigations on sterols XII: The conversion of dihydrovitamin D2-I and D2-II into dihydrotachysterol2

โœ Scribed by P. Westerhof; J. A. Keverling Buisman


Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
187 KB
Volume
78
Category
Article
ISSN
0165-0513

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โœฆ Synopsis


Abstract

The results are presented of investigations on preparing dihydrotachysterol~2~ from dihydrovitamins D~2~โ€I and D~2~โ€II.


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## Abstract The quantum yields of the isomerizations of preโ€ergocalciferol and tachysterol~2~ in ether at 20ยฐ under the influence of ultraviolet light of 2537 ร… were found to be 0.49 and 0.11 respectively. Ergosterol is not formed from tachysterol~2~ during irradiation but originates exclusively fr