Acrolein, acrylic
acid, crotonaldehyde, crotonic acid, ethyl crotonate, isocrotonic acid, fumeric
acid, maleic acid, maleic anhydride, methyl acrylate are few examples of
compounds bearing 1,2-unsaturated carbonyl functionality, characterized by
presence of keto-ethylenic moiety
separated by a single C-C bond.
This unique
configuration assigns the molecule an reactive double bond amenable to get
attack by nucleophile at 1st as well 2nd position however 2nd predominate
leading to formation of 1,4 addition type product. Synthetically, the
1,2-unsaturated carbonyl compounds can be synthesize by numerous synthetic
pathways, aldol reaction among meritoriously distinguished.
Aldol
condensation represents an important class of selfcondensing reactions
providing unique synthetic platform for yielding 1,2-unsaturated carbonyl
compounds, further chemically modified as per applicability.
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