Anisaldehyde Anisic acid

HNO3 — anisaldehyde + anisic acid. Red. —> p ropylanisole. ZnCl2 —y metanetbole, C20HJ4OJ, m.p. 133 . Slowly decomp, in sunlight. 

Anise oil contains (rani-anethole (75-90%), estragole (methylchavicol) (1%), anise ketone ( -methoxyphenylacetone), and P-caryophyllene. Other compounds in minor concentrations include anisaldehyde, anisic acid (oxidation products of anethole), linalool, limonene, a-pinene, acetaldehyde, /)-cresol, creosol, hydroquinine, P-famesene, y-hima-chalene, neophytadiene, and ar-curcumene (karrer). ° ... 

Typical examples are listed in Table 2.1. A few oxidations are effected by RuO but in general it is too powerful an oxidant for this purpose. The system RuCyaq. NaCl-CCy Pt anode oxidised benzyl alcohol to benzaldehyde and benzoic acid and p-anisaldehyde to p-anisic acid [24], and a wide range of primary alcohols and aldehydes were converted to carboxylic acids, secondary alcohols to ketones, l, -diols to lactones and keto acids from RuOj/aq. NaCl pH 4/Na(H3PO )/Pt electrodes (Tables 2.1-2.4). The system [RuO ] "/aq. K3(S303)/Adogen /CH3Cl3 oxidised benzyhc alcohols to aldehydes [30]. The oxidation catalyst TPAP (( Pr N)[RuO ]) (cf. 1.3.4) is extremely useful as an oxidant of primary alcohols to aldehydes and secondary alcohols to ketones without... 

Tahiti vanilla (V. tahitensis Moore), which possess a different aroma, is considered as less valuable and can be distinguished from V. planifolia because of its constituents p-anisic acid and p-anisaldehyde [295[. The smaller vanillons (Vanilla pompona Schiede) are practically not available anymore. 

CsHgC, Mr 136.15, pi.85kPa 132 °C, df 1.1192, n 1.5703, occurs in many essential oils, often together with anethole. It is a colorless to slightly yellowish liquid with a sweet, mimosa, hawthorn odor. p-Anisaldehyde can be hydrogenated to anise alcohol and readily oxidizes to anisic acid when exposed to air. Synthetic routes to anisaldehyde start from p-cresyl methyl ether, which is oxidized e.g. by manganese dioxide or by oxygen or peroxy compounds in the presence of transition metal catalysts [170], [171]. 

Amyl isovalerate Amyl octanoate Amyl propionate Amyl salicylate p-Anisaldehyde p-Anisic acid Anisole p-Anisyl acetate p-Anisyl alcohol Anisyl butyrate Anisyl formate Anisyl phenylacetate Anisyl, propionate Beechwood creosote Benzaldehyde... 

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