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Questions
How will you convert ethanal into the following compound?
But-2-enal
Carry out the following conversion:
Ethanal to But-2-enal
How will you bring about the following conversion?
Ethanal to but-2-enal
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Solution 1
\[\ce{\underset{Ethanal}{2CH3CHO}->[(i) dil.NaOH][(ii) H+, \Delta]\underset{But-2-enal}{CH3CH = CHCHO}}\]
Solution 2
\[\ce{\underset{Ethanal}{2CH3CHO}->[dil.NaOH][Aldol condensation]\underset{Hydroxybutanal}{\overset{4}{C}H3 - \overset{3}{C}HOH - \overset{2}{C}H2 - \overset{1}{C}HO}->[H3O+/\Delta][-H2O]\underset{But-2-enal}{CH3 - CH = CH - CHO}}\]
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\[\begin{array}{cc}
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\[\begin{array}{cc}
\ce{CH3}\phantom{.................}\\
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