Coniferyl acetate

Recently, small amounts of guaiacylglycerol 0-coniferyl ether have been isolated by Nimz (35) after percolating pre-extracted sprucewood for 8 days with 2% aqueous acetic acid at 100°C. This particular 0-aryl... 

There are cases where the peroxidase is not activated by H202, but by a reaction product instead. Ferrer et al. (1990) described the oxidation of the auxin indole-3-acetic acid (LAA 2.49) and molecular oxygen by a cell wall peroxidase that was able to oxidize coniferyl alcohol (2.48) in the absence of H2C>2. 

Ferrer, M. A., Pedreno, M. A., Munoz, R., and Ros Barcelo, A., 1990, Oxidation of coniferyl alcohol by cell wall peroxidases at the expense of indole-3-acetic acid and 02, FEBSLett. 276 127-130. 

Cobalt(III) fluoride, 397 Cobalt(II) phthalocyanine, 102-103 Collman s reagent, 174-175 6-Coniceine, 398 Coniferyl alcohol, 351 Cope rearrangement, 31,311 Copper(ll) acetate, 103, 211 Copper(fl) acetate-Iron(II) sulfate, 103-104 Copper(I) bromide-Diinethyl sulfide, 104-105... 

Flash photolysis of coniferyl alcohol in water and in acetic acid produces a transient species with at 350 nm [147]. It decays by first-order kinetics in both solvents, but with very different lifetimes 500 s in water and 1.2 s in acetic acid. The transient is unreactive toward oxygen. Based on this reactivity pattern, Leary [147] assigned this transient as the corresponding quinone methide. Although this initial experiment used a flash-photolysis setup, the quinone methide is sufficiently long-lived that it can be detected with a modern UV-visible spectrophotometer using diode-array detection [148]. 

Compound 34 was isolated as being yellowish amorphous. The FD-MS spectrum of 34 exhibited an M at m/z 582. In the EI-MS spectrum of 34, peaks at m/z 386, 180, 151 and 137 were observed as principal ions. A prominent peak at m/z 386 could be assigned to neolignan structure 30. A large peak at m/z 180 could be due to a coniferyl alcohol ion derived from an arylglycerol moiety in structure 34. The spectrum of the acetate 34a (Table 4.3) showed it to be a mixture of threo and erythro isomers. Two doublets at 5 6.08 (J=5.5 Hz) and 6.15 (J=6.1 Hz) were attributed to H-7" in an arylglycerol structure for erythro and threo isomers, respectively. The relative... 

The first step of phenylpropanoid biosynthesis is conversion of phenylalanine into cinnamic acid by cleavage of ammonium group by the enzyme phenylalanine ammonia-lyase (PAL). Reduction of carboxylic acid from the cinnamic acid leads to cinnamaldehyde, which is then acylated with acetate from acetyl-CoA to form coniferyl alcohol [14]. Reductive cleavage of coniferyl alcohol by eugenol synthase yields eugenol [15]. 

Available data indicate jasmine absolute to be nonirritating, nonsensitizing, and nonphoto-toxic. However, allergenic components of the absolute have been characterized as con-iferyl acetate and coniferyl benzoate. ... 

Figure 10.15 The production of the sex attractant coniferyl alcohol by fruit flies from dimethoxycinnamic alcohol and acetate from flowers...

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