Answered: provitamin D, vitamin D, hv но…

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Chemistry

provitamin D, vitamin D, hv но 7-dehydrocholesterol Но"

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter11: Isolation Of Caffeine From Tea Le

Section: Chapter Questions

Problem 3Q

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Question

Vitamin D3, the most abundant of the D vitamins, is synthesized from 7-dehydrocholesterol, a compound found in milk and fatty sh such as salmon and mackerel. When the skin is exposed to sunlight, a photochemical electrocyclic ring opening forms provitamin D3, which is then converted to vitamin D3 by a sigmatropic rearrangement (Section 27.5). Draw the structure of provitamin D3.

provitamin D,
vitamin D,
hv
но
7-dehydrocholesterol
Но"

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