Procyanidin A1 is an
A type proanthocyanidin
A type proanthocyanidins are a specific type of proanthocyanidins, which are a class of flavonoid. Proanthocyanidins fall under a wide range of names in the nutritional and scientific vernacular, including oligomeric proanthocyanidins, flavonoids, ...
dimer.
It is an
epicatechin
Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids.
The name of the catechin chemical family derives from '' catechu'', which is the tann ...
-(2β→7,4β→8)-
catechin
Catechin is a flavan-3-ol, a type of secondary metabolite providing antioxidant roles in plants. It belongs to the subgroup of polyphenols called flavonoids.
The name of the catechin chemical family derives from ''catechu'', which is the tannic ...
dimer found in ''
Rhododendron spiciferum'', in
peanut
The peanut (''Arachis hypogaea''), also known as the groundnut, goober (US), goober pea, pindar (US) or monkey nut (UK), is a legume crop grown mainly for its edible seeds. It is widely grown in the tropics and subtropics by small and large ...
skins and in ''
Ecdysanthera utilis''.
Procyanidin B1
Procyanidin B1 is a procyanidin dimer.
It is a molecule with a 4→8 bond (epicatechin-(4β→8)-catechin). Proanthocyanidin-B1 can be found in ''Cinnamomum verum'' (Ceylon cinnamon, in the rind, bark or cortex), in ''Uncaria guianensis'' (cat's ...
can be converted into procyanidin A1 by radical oxidation using
1,1-diphenyl-2-picrylhydrazyl (DPPH) radicals under neutral conditions.
[Conversion of procyanidin B-type (catechin dimer) to A-type: evidence for abstraction of C-2 hydrogen in catechin during radical oxidation. Kazunari Kondo, Masaaki Kurihara, Kiyoshi Fukuhara, Takashi Tanaka, Takashi Suzuki, Naoki Miyata and Masatake Toyoda, Tetrahedron Letters, 22 January 2000, Volume 41, Issue 4, Pages 485–488, ]
References
Procyanidin dimers
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