Chirality & Odour Perception
John C. Leffingwell, Ph.D.

The Methyl 2-methylpentanoates

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Photo by permission of M. Roudintska - Art & Parfum

Methyl (R)-2-methylpentanoate - nearly odorless (by GC-O)

Ref: Grüb, H., Müller, D.A., Schmidt, H.-L., Rossmann, A., Werner, R.A., Mosandl, A. and Lögtenbörger, H.-J. (2008) Quality Control, in Flavourings: Production, Composition, Applications, Regulations (eds E. Ziegler and H. Ziegler), Wiley-VCH Verlag GmbH, Weinheim, Germany, p. 610; Karl, V., Dietrich, A. and Mosandl, A. (1993), Stereoisomeric flavour compounds. LXIV: The chirospecific analysis of 2-alkyl-branched flavour compounds from apple headspace extracts and their sensory evaluation. Phytochem. Anal., 4: 158–164

Methyl (S)-2-methylpentanoate - fruity, sweet, apple-like (by GC-O)

Ref: Grüb, H., Müller, D.A., Schmidt, H.-L., Rossmann, A., Werner, R.A., Mosandl, A. and Lögtenbörger, H.-J. (2008) Quality Control, in Flavourings: Production, Composition, Applications, Regulations (eds E. Ziegler and H. Ziegler), Wiley-VCH Verlag GmbH, Weinheim, Germany, p. 610; Karl, V., Dietrich, A. and Mosandl, A. (1993), Stereoisomeric flavour compounds. LXIV: The chirospecific analysis of 2-alkyl-branched flavour compounds from apple headspace extracts and their sensory evaluation. Phytochem. Anal., 4: 158–164

Cyclic Terpenoid Odorants

Bicyclic Terpenoid Odorants

Acyclic Terpenoid Odorants

Ionones, Irones, Damascones & Structurally Related Odorants

Acyclics (Alcohols, Esters, Acids, Aldehydes)

Lactones

Sesquiterpenoid Related Odorants

Steroid Urine Type Odorants

Sandalwood Type Odorants

Musk Odorants

Miscellaneous

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