Conversion of benzaldehyde to 3-phenyl-prop-2-en-1-oic acid is:

Question

Conversion of benzaldehyde to 3-phenyl-prop-2-en-1-oic acid is: (A) Perkin condensation (B) Claisen condensation (C) Oxidative addition (D) Aldol condensation

Tardigrade Admin · Accepted Answer

(i) Benzaldehyde does not undergo aldol condensation as it does not have

a

-hydrogen atom.
(ii) Perkin condensation

benzaldehyde C_{6} H_{5} C H O + acetic anhydride (C H_{3} CO)_{2} O C H_{3} COON a - H_{2} O, Δ

3-phenylprop 2-en-1 oicacid C_{6} H_{5} C H = C H COO H + C H_{3} COO H

Q. Conversion of benzaldehyde to 3-phenyl-prop-2-en-1-oic acid is:

Perkin condensation

Claisen condensation

Oxidative addition

Aldol condensation

(i) Benzaldehyde does not undergo aldol condensation as it does not have a-hydrogen atom. (ii) Perkin condensation benzaldehydeC6​H5​CHO​+acetic anhydride(CH3​CO)2​O​CH3​COONa−H2​O,Δ​ 3−phenylprop 2−en−1 oicacidC6​H5​CH=CHCOOH+CH3​COOH​

Q. Conversion of benzaldehyde to $3$ -phenyl-prop- $2$ -en- $1$ -oic acid is:

(i) Benzaldehyde does not undergo aldol condensation as it does not have $a$ -hydrogen atom.
(ii) Perkin condensation
$benzaldehyde C_{6} H_{5} C H O + acetic anhydride (C H_{3} CO)_{2} O C H_{3} COON a - H_{2} O, Δ$
$3-phenylprop 2-en-1 oicacid C_{6} H_{5} C H = C H COO H + C H_{3} COO H$