Thiazole. 2-isobutyl

Thiazole, 2-( D-galactopentaacetoxypentyl)-4-methyl-synthesis, 6, 295 Thiazole, 2-hydrazi nosynthesis, 6, 297 Thiazole, 2-hydroxy-reactions, 6, 285-286 synthesis, 6, 298, 299 tautomerism, 5, 99 6, 247, 269 Thiazole, 4-hydroxy-reactions, 5, 101 6, 287-288 synthesis, 6, 303 tautomerism, 6, 248, 269 Thiazole, 2-hydroxybenzyl-biosynthesis, 1, 96 Thiazole, 2-hydroxy-4-methyl-arylation, 6, 256 Thiazole, 2-iodo-photolysis, 6, 244 Thiazole, 2-isobutyl-occurrence, 6, 327... 

The anal gland secretion of beaver, C. canadensis, differs between the sexes (Gr0nneberg, 1978-79). The male grey duiker, Sylvicapra grimmia, has more 2-heptanone and 2-nonadecanone in its preorbital secretion than the female. Two thiazoles (2-isobutyl-1,3-thiazole and 2-isobutyl-4,5-dihydro-l,3-thiazole) and an epoxy ketone (3,4-epoxy-2-dodecanone) are also more abundant in the male s secretion. Correlated with these chemical differences is the fact that only males scent mark with the preorbital gland (Burger etal., 1990). 

Synonyms Isobutylthiazole Thiazole, 2-isobutyl- Thiazole, 2-(2-methylpropyl)-... 

Thiazole, 2-isobutyl-. See 2-lsobutylthiazole Thiazole, 4-methyl-2-(1-methylethyl)-. See2-lsopropyl-4-methyl thiazole Thiazole, 2-(2-methylpropyl)-. See2-Isobutylthiazole... 

Isobutyl-l,3-thiazole 2-Nitropentane 2-Isobutyl-4,5-dihydro- 1,3-thiazole... 

Isobutyl-4,5-dihydro-1,3-thiazole Nonan-4-olide Phenylacetonitrile... 

Upstream migrating glass eels also swim toward compounds with earthy and green (vegetable) odors. These are pyrazines, thiazoles, and alcohols of the cyclohexanol type (Sola, 1995). One of these compounds, 2-isobutyl-3-methoxypyrazine, is common in rivers and lakes (Hwang eta/., 1984). 

CIC The powerful odour is dominated by 2-isobutyl thiazole and 3-pentanethiol. The green notes are lipid degradation products like (E)-2-hexenal, hexanal and higher unsaturated aldehydes, the pineapple-pear like fruity notes are derived from methyl hexanoate, ethyl-2-hexenoate and hexyl acetate. The spicy cinnamon notes are represented by 3-phenyl propyl acetate, cinnamyl acetate, methyl cinnamate, ethyl cinna-mate and ciimamaldehyde. Gamma-decalactone and 2,5-dimethyl-4-hydroxy-furan-3(2H)-one and 3-hydroxy-2-butanone add the sweet, creamy body. Beta-famesene, citronellol, 2-phenylethanol, beta-ionone add the sweet, floral, quincelike part and methyl benzoate and ethyl benzoate impart a characteristic medicinal, exotic topnote. 

Thiazoles and pyrazines have somewhat similar sensory properties. Pittet and Hniza [54] and Ho and Jim [63] have reported that the alkylthiazoles give green, nutty, roasted, vegetable, or meaty notes. Trimethyl thiazole is reported to have a cocoa, nutty character. 2-isobutyl thiazole is one of the best known thiazoles and has a strong, green odor of tomato leaf This compound is considered to be important to tomato flavor. 2,4-dimethyl-5-vinyl thiazole has a nut-like odor. 2-acetyl thiazole is characterized as having a nutty, cereal, and popcorn flavor [47],... 

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