2]O), to give 3,4,5-trimethoxy cinnamic
alcohol (3 mg).
The [2+2] photo-induced cycloaddition reaction of cinnamic
acid derivatives, which leads to crosslinking in polymer systems, is the basis of commercial negative photo-resists (1-3).
Grodzinsky (1987) devised a method for the isolation of phenolics such as cinnamic
, p-coumaric, and p-hydroxybenzoic acids by using ion-exchange resins under wheat, rye, and other cereals.
Materials used were: Acrylic acid, methacrylic acid, sorbic acid, cinnamic
acid, 4-hydroxy-benzophenone and tetrabutylamonium hydroxide (1.
Both compounds work even longer when combined with cinnamic
acid or an inorganic polyphosphate (made in Korea any not yet commercially available in the United States).
2011) found that in phenolic acids such as benzoic acid, cinnamic
acid, hydroxybenzoic acids (p-hydroxybenzoic, protocatechuic, gallic acid, and syringic), and hydroxycinnamic acids (p-coumaric, caffeic and ferulic), the antimicrobial activity of the hydroxycinnamic acids was comparable or higher than that of hydroxybenzoic acids with the same number of hydroxyl groups.
4-Ethoxymethylene-2-phenyl-2-oxazolin-5-one (oxazolone), 2,4-dinitrochlorobenzene, acetaminophen, 3-aminophenol, cinnamic
aldehyde, isoeugenol, citral, tetramethylthiuram disulfide, 2-methoxy-4-methylphenol, resorcinol, eugenol, geraniol, cinnamic
alcohol, benzalkonium chloride, vanillin, lactic acid, A,A-diethyl-3-methylbenzamide and 4-aminoacetanilide were obtained from Sigma Aldrich (Taufkirchen, Germany), whereas N,N'-bis(4-aminophenyl)-2,5-diamino-1,4-quinone-diimine (Bandrowski's base) was purchased from ICN Biomedicals (Aurora, OH, USA).
HPLC analysis indicated that the major polyphenols in the SFE extracts consisted of chlorogenic acid, caffeic acid, syrigin, procyanidin B2, (-)-epicatechin, cinnamic
acid, coumaric acid, phlorizin and quercetin, of which procyanidin B2 had the highest content of 231.
Benzoic acid can easily be converted to cinnamic
acid, a key compound in the phenylpropanoid pathway.
Although the anti-diabetic activity of cinnamic
acid, a pure compound from cinnamon, has been reported but its mechanism(s) is not yet clear.
2001) including esters of cinnamic
acid either methyl cinnamate (Siddiqui et al.
Other natural compounds selected for this battery of tests included cinnamic
acid from cinnamon tree bark; salicylic acid, like that found in willow; and 2,5-DBA (dihydroxybenzaldehyde), found in chard.