9
Question
From the above reactions, the number of reaction(s) that produce(s) benzaldehyde is
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Solution
All four reactions produce benzaldehyde.
(I) This is Gatterman-Koch formylation. Benzene is treated under high pressure with CO and HCl in the presence of anhyd.AlCl3/CuCl catalyst to form benzaldehyde.
(II) Hydrolysis of benzyl chloride by heating with water will give benzaldehyde.
(III) This is a Rosenmund reduction. Benzoyl chloride is hydrogenated over Pd−BaSO4 catalyst to give benzaldehyde.
(IV) Partial reduction of methyl benzoate with DIBALH in the presence of toluene as a solvent at −780C gives benzaldehyde.
Ans-4
(I) This is Gatterman-Koch formylation. Benzene is treated under high pressure with CO and HCl in the presence of anhyd.AlCl3/CuCl catalyst to form benzaldehyde.
(II) Hydrolysis of benzyl chloride by heating with water will give benzaldehyde.
(III) This is a Rosenmund reduction. Benzoyl chloride is hydrogenated over
Pd−BaSO4 catalyst to give benzaldehyde.
(IV) Partial reduction of methyl benzoate with DIBALH in the presence of toluene as a solvent at −780C gives benzaldehyde.
Ans-4
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