A) Benzoin condensation
B) claisen condensation
C) Cannizaros reaction
D) Perkin reaction
Correct Answer: B
Solution :
Claisen condensation: Aromatic aldehyde condenses with esters having \[\alpha -\] hydrogen atoms like ethyl acetate, in the presence of metallic Na and \[{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{OH}\] to form esters of \[\alpha ,\beta -\] unsaturated acids. \[\underset{\text{Benzaldehyde}}{\mathop{{{C}_{6}}{{H}_{5}}CHO}}\,\,+\underset{\text{Ethyl}\,\text{acetate}}{\mathop{\,HC{{H}_{2}}-COO{{C}_{2}}{{H}_{5}}}}\,\xrightarrow[{{C}_{2}}{{H}_{5}}OH]{Na}\] \[\underset{\text{Ethyl cinnamate}}{\mathop{{{C}_{6}}{{H}_{5}}CH=CHCOO{{C}_{2}}}}\,{{H}_{5}}+{{H}_{2}}O\]
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