Question

X and Y in the following reactions are:

• A.

  

• B.

  

• C.

  

• D.

  

Hint:

Use Rosenmund reduction (SOCl\textsubscript{2}, then H\textsubscript{2}/Pd-BaSO\textsubscript{4}) to convert acid to aldehyde. Hydroboration-oxidation gives primary alcohol.

Answer 1

The Correct Option is B

- Step (i) SOCl\textsubscript{2} converts the –COOH group to –COCl.
- Step (ii) H\textsubscript{2}/Pd–BaSO\textsubscript{4} reduces acid chlorides to aldehydes → X is benzaldehyde.
- Hydroboration-oxidation (B\textsubscript{2}H\textsubscript{6}/H\textsubscript{2}O\textsuperscript{+}) of benzoic acid yields benzyl alcohol. Therefore, Y is benzyl alcohol and X is benzaldehyde.