Product Code Database
Example Keywords: coat -shoes $85-191
   » » Wiki: Prenol
Tag Wiki 'Prenol'.
Tag

Prenol, or 3-methyl-2-buten-1-ol, is a natural alcohol. It is one of the most simple . It occurs naturally in , cranberry, bilberry, currants, grapes, raspberry, blackberry, tomato, white bread, hop oil, coffee, , cloudberry and passion fruit. It is a clear colorless oil that is reasonably soluble in water and with most common organic .

Prenol has a fruity odor and is used occasionally in perfumery. It is also manufactured industrially by (in , ) and by (in Asia) as an intermediate to pharmaceuticals and aroma compounds. Global production in 2001 was between 6000 and 13,000 tons.


Industrial production
Prenol is produced industrially by the reaction of with , followed by the isomerization of the resulting (3-methyl-3-buten-1-ol).See, e.g., .


Uses
Prenol is mainly used as a precursor to , an intermediate in the industrial production of , E, and K. For this purpose, prenol is oxidized to the aldehyde .
(2025). 9780471238966


Polyprenols
Prenol is a building block of isoprenoid alcohols, which have the general formula:
H–CH2CCH3=CHCH2 n–OH

The repeating C5H8 moiety in the brackets is called , and these compounds are sometimes called 'isoprenols'.See, e.g., . They should not be confused with , which is an isomer of prenol with a terminal double bond. The simplest isoprenoid alcohol is ( n = 2): higher oligomers include ( n = 3) and ( n = 4).

When the isoprene unit attached to the alcohol is saturated, the compound is referred to as a . Dolichols are important as glycosyl carriers in the synthesis of . They also play a major role in protecting cellular membranes, stabilising cell proteins and supporting the body's immune system.

Prenol is polymerized by dehydration reactions; when there are at least five isoprene units ( n in the above formula is greater than or equal to five), the is called a . Polyprenols can contain up to 100 isoprene units ( n = 100) linked end to end with the (–OH) remaining at the end. These long-chain isoprenoid alcohols are also called ‘terpenols’. They are important in the acylation of , , and fat-soluble , and .

Polyprenols also play a vital role in . Research indicates that ingested polyprenols are metabolised by human and animal liver into which then take part in the dolichol phosphate cycle and are therefore easily assimilated by humans and animals. The pharmacological activity of polyprenols is based on their substitutive effect in the case of dolichol deficits which are observed with chronic inflammatory, degenerative and oncological diseases..

Live conifer needles are one of the richest and most widely available sources for polyprenol extraction in the world. Commercial extraction of polyprenols involves a soft extraction procedure that enables them to be extracted without destroying their biological activity..


Notes

External links
Page 1 of 1
1
Page 1 of 1
1

Account

Social:
Pages:  ..   .. 
Items:  .. 

Navigation

General: Atom Feed Atom Feed  .. 
Help:  ..   .. 
Category:  ..   .. 
Media:  ..   .. 
Posts:  ..   ..   .. 

Statistics

Page:  .. 
Summary:  .. 
1 Tags
10/10 Page Rank
5 Page Refs
1s Time