hemiacetal

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hemiacetal

(ˌhɛmɪəˈsiːtæl)
n
any of a class of compounds derived from aldehydes by adding an alcohol to the carbonyl group
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
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Noun1.hemiacetal - an organic compound usually formed as an intermediate product in the preparation of acetals from aldehydes or ketones
organic compound - any compound of carbon and another element or a radical
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The thermal degradation mechanism of anthocyanins was explained by Sadilova [27], involving the transition from the hemiketal to the chalcone form due to the increase of pH.
Monomeric anthocyanins undergo a reversible structural transformation as a function of pH (colored oxonium form at pH 1.0 and colorless hemiketal form at pH 4.5).
Then it will reacted with dimedone via Michael addition followed by addition of phenolic hydroxyl group to the carbonyl carbon lead to cyclic hemiketal which on dehydration gave desire product (4a).