from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A thick, colorless to pale yellow liquid, C4H8O2, obtained from acetaldehyde and used in perfumery and as a solvent.
- n. A similar aldehyde.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any aldehyde or ketone having a hydroxy group in the beta- position
from the GNU version of the Collaborative International Dictionary of English
- n. A colorless liquid, C4H8O2, obtained by condensation of two molecules of acetaldehyde: CH3CHO + CH3CHO = H3CH(OH)CH2CO; also, any of various derivatives of this. The same reaction has been applied, under the name of aldol condensation, to the production of many compounds.
from The Century Dictionary and Cyclopedia
- n. A compound, CH3CHOHCH2CHO, formed by the condensation of acetaldehyde by means of zinc chlorid. The official name is butanalol-3.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. an oily colorless liquid obtained by the condensation of two molecules of acetaldehyde; contains an alcohol group (-OH) and an aldehyde group (-CHO)
With all this focus on polyketide/macrolide synthesis, I thought Iâ€™d highlight an interesting review in this weekâ€™s Angewandte; a genuine masterclass in the aldol reaction.
In fact, our studies show that serine meets the first two criteria, and recent work24 has demonstrated that serine catalyses certain asymmetric aldol reactions with high enantioselectivity; it has also been highlighted as one of a small number of amino acids likely to have played an important role in prebiotic chemistry25, 26.
Last night I was even at the stage of sitting in the exam hall waiting to be told to open the test paper, when I realised that I could recall not one of the countless details of reagents, methods and strategies involved in the Grignard reaction in particular (yes, alkylmagnesium, I know that much) or the aldol reaction, Claesen rerrangement, Friedel-Crafts acylation and all the rest.
The aldol reaction is a key process in living organisms associated with the processing and synthesis of carbohydrates.
In a previous paper, published in the journal Science on March 7, the chemists reported another successful chemical reaction that uses designer enzymes to catalyze a retro-aldol reaction, which involves breaking a carbon-carbon bond.
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Ketones can be used in aldol condensation reactions, although they are less reactive than aldehydes in this regard.
The implementation of the aldol reaction in the active site of an enzyme has been an important challenge.
2BOTf anti-selective aldol condensation according to a known procedure