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