Question

$\mathrm{P}\underset{2.{\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{1.C{\mathrm{H}}_3\mathrm{MgBr}}{\to }}\mathrm{R}\underset{\text{2.}\mathrm{\Delta }}{\overset{\text{1.dil.NaOH}}{\to }}$ 4-methylpent-3-en-2-one $P$ is

• A. ethanaimine
• B. ethanal
• C. propane
• D. ethanenitrile

Answer 1

Answer: (D)

Ethane nitrile on reaction with $C{H}_{3}MgBr$ followed by hydrolysis produced acetone which on reaction with dil. NaOH undergo aldol condensation to produce 4-methyl pent-3-ene-2-one as shown below