Chirospecific analysis of 2‐alkyl‐branched alcohols, acids, and esters: Chirality evaluation of 2‐methylbutanoates from apples and pineapples

Abstract
Using perethylated β‐cyclodextrin as a chiral stationary phase the alcohols 2‐methyl‐1‐butanol (1), ‐pentanol (2), ‐hexanol (3) and 2‐ethyl‐1‐hexanol (4), the free carboxylic acids 2‐methyl‐butanoic (5), ‐pentanoic (6), ‐hexanoic (7) and 2‐ethylhexanoic (8) as well as the esters methyl and ethyl 2‐methylbutanote (9, 10) are resolved into their mirror images without derivatization. Chiral capillary gas chromatography was used to determine the enantiomeric distribution of the 2‐methylbutanoates 9 and 10 in pineapples and 15 apple varieties, using extractive and dynamic headspace methods, respectively.

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