## Abstract Decarboxylation of a number of α‐carboxy‐α,β‐unsaturated nitriles leads to β,γ‐unsaturated nitriles. These products smoothly rearrange into the normal α,β‐unsaturated nitriles.
Investigations in the vitamin A series V. Some aspects of dehydration of polyenic alcohols
✍ Scribed by P. H. van Leeuwen; H. O. Huisman
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 461 KB
- Volume
- 80
- Category
- Article
- ISSN
- 0165-0513
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✦ Synopsis
Abstract
The facile acid‐catalysed dehydration of substituted β‐ionols, e.g. β‐C~15~‐ and β‐C~20~‐hydroxy esters, gives a substantial yield of the R (= retro) compounds and not of the corresponding β‐ionylidene compounds. This is correlated with the different properties of these molecules: almost planar configuration of R‐compounds vs. distorted β‐ionylidene derivatives.
📜 SIMILAR VOLUMES
## Abstract An examination has been made of the significance of several vitamin factors in the production of bracken ‘poisoning’ in ruminants. Bracken feeding led to a rapid cessation of urinary vitamin‐B1 excretion but this was not associated with any consistent increase in pyruvic acid excretion