Chirality Evaluation of 2-Heptanol and Z-4-Hepten-2-ol from Banana Fruit Using Multidimensional Gas Chromatography
نویسندگان
چکیده
A polar fraction obtained from banana fruit pulp by high-vacuum distillation / solvent extraction (pentane-dichloromethane, 2 + 1) and subsequent liquid chromatography on silica gel was derivatized with isopropylisocyanate. Separation of enantiomers of heptan-2-ol and Z-4-hepten-2-ol was performed via their carbamates by means of multidimensional gas chromatography using an achiral (D B -5, column 1) and a chiral (XE-60, column 2) capillary column. The enantiomeric ratios of heptan-2-ol and Z-4-hepten-2-ol were determined to be (/?)( — ) 39% and (S)( + ) 61% as well as (/? )(+ ) 26% and (S )(—) 74% , respectively. The absolute configuration of optically en riched (5 ) (—)-Z-4-hepten-2-ol was determined from NM R spectroscopy.
منابع مشابه
Enantioselective Multidimensional Gas Chromatography of Some Secondary Alcohols and Their Acetates from Banana
Using enantioselective M D G C the enantiom eric d istribution o f alkan-(alken-)2-yl-acetates from bananas is achieved. A fter simple acetylation their corresponding alcohols 2-pentanol, 2-hexanol, 2-heptanol and (Z)-4-hepten-2-ol respectively are also exactly stereodifferentiated by the same method. All com pounds investigated esters as well as alcohols exhibit a rem arkable excess o f the (5...
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