Menthane-8-thiol

Kopke X Schmarr HG, Mosandl A, Stereoisomeric flavour compounds. Part LVII Xhe stereoisomers of 3-oxo-p-menthane-8-thiol acetate, simultaneously stereoanalyzed with their corresponding thiols, FlavourFragr/7 205—211, 1992. [Pg.179]

Buchu leaf Agathosma betulina (Ber-gius) PUlans, A. crenulata (L.) PUlans trfl s-p-Menthane-8-thiol-3-one and its S-acetate (characteristic minor components), (+)-limonene (10)... [Pg.82]

The reaction of pulegone or isopulegone with hydrogen sulphide in triethyl-amine leads to the interesting p-menthane-8-thiol-3-one (163), a constituent of Buchu leaf oil Barosina betulina Bartl., Rutaceae), which has a black-currant flavour. Reductive dimerization of pulegone affords the alcohol (164), which... [Pg.31]

Bohlmann has isolated another naturally occurring thymol epoxy-ester (c/. Vol. 1, p. 34 Vol. 3, p. 46), this time from Wedelia forsteriana Compound (137)has been isolated from Pluchea odorata. Pseudomonas fluorescens converts (-)-menthone into cis- and trans-(138). In addition to known (Vol. 2, p. 31) p-menthane-8-thiol-3-ones in Buchu leaf oil, 5-methyl dnd S-acetyl derivatives have been isolated... [Pg.29]

CIC The bitter taste originates from naringin. Nootkatone imparts the characteristic fresh woody odour. Acetaldehyde and ethyl butyrate improve the juicy note and 1-p-menthane-8-thiol is responsible for the typical exotic grapefruit character. [Pg.416]

Fig, 6,40 Enantio-MDGC analysis of laboratory prepared huchu leaf oil A pre-column separation B main column separation limonene 1 (S), 2 (R) menthone 3 (IS, 4R) isomen-thone 6 (IS, 4S) pulegone 8 (S) cis-3-oxo-p-menthane-8-thiol 9 (IS, 4R) trans-3-oxo-p-menthane-8-thiol 12 (IS, 4S) trans-3-oxo-p-menthane-8-thiol acetate 14 (IS, 4S) cis-3-oxo-p-menthan-8-thiol acetate 15 (IS, 4R) (from ref [101])... [Pg.687]

Fig, 6,42 Synthesis and configurational cGC-analysis of p-menthane-8-thiol-3-one (from ref [102])... [Pg.689]

D. Lamparsky and P. Schudel. p-Menthane-8-thiol-3-one, a new component of Buchu leaf oil. Tetrahedron Lett. 36, 3323-3326 (1971). [Pg.702]

Catty OT Blackcurrant leaves, ribes, tomato plants, oxidized (p-Menthane-8-thiol-... [Pg.484]

The characteristic aroma of blackcurrants (varieties oiRibes nigrum, Grossulariaceae) is mainly a consequence of aliphatic and aUcycUc thiols. The bearer of the characteristic cat odour is 4-methoxy-2-methyl-2-thiol, called blackcurrant mercaptan (8-124), which occurs also in olive oil and green tea. Other important components are 4-mercapto-4-methylpentan-2-one called cat ketone (8-125) and (lS,4R)-p-menthan-8-thiol-2-one (see Section 8.2.13.1.1). Cat ketone is also found in grapefruits, some hop cultivars, basil and some aromatic wines. The leaves contain about 0.7% essential oil, whose main component isp-cymol, the sulfur compounds of which contribute to the strong smell, mainlyp-menthan-8-thiol-2-one. [Pg.613]

Of the few known terpene compounds that contain heteroatoms such as nitrogen or sulfur, the thiol 8-mercapto-p-menthan-3-one described below has qualitatively important applications as a fragrance and flavor substance. The second thiol, -p-menthene-8-thiol, is described because its odor threshold value is far lower than that of most other fragrance and flavor materials. [Pg.74]

Epithlo-c/s-p-menthane Simple thiols Structural class 1 1685 N No safety concern... [Pg.456]

Mercaptoimidazoline. See Ethylene thiourea, 8-Mercapto-p-menthane-3-one. See p-Mentha- s-thiol-3-one... [Pg.2528]

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