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Standard XII

Chemistry

Reduction of Carboxylic Acids

Treatment of ...

Question

Treatment of benzene with $C O / H C l$ in the presence of anhydrous $A l C l_{3} / C u C l$ followed by reaction with $A c_{2} O / N a O A c$ gives compound X as the major product. Compound X upon reaction with $B r_{2} / N a_{2} C O_{3}$ , followed by heating at 473 K with moist $K O H$ furnishes Y as the major product. Reaction of X with $H_{2} / P d - C,$ followed by $H_{3} P O_{4}$ treatment gives Z as the major product.
The compound Z is:

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Solution

The correct option is A

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Similar questions

Q. Treatment of benzene with

C O / H C l

in the presence of anhydrous

A l C l_{3} / C u C l

followed by reaction with

A c_{2} O / N a O A c

gives compound X as the major product. Compound X upon reaction with

B r_{2} / N a_{2} C O_{3}

, followed by heating at 473 K with moist

K O H

furnishes Y as the major product. Reaction of X with

H_{2} / P d - C,

followed by

H_{3} P O_{4}

treatment gives Z as the major product.
The compound Z is:

Q. The reaction of compound P with

C H_{3} M g B r

(excess) in

(C_{2} H_{5})_{2} O

followed by addition of

H_{2} O

gives Q. The compound Q on treatment with

H_{2} S O_{4}

0^{\circ} C

gives R. The reaction of R with

C H_{3} C O C l

in the presence of anhydrous

A l C l_{3}

C H_{2} C l_{2}

followed by treatment with

H_{2} O

produces compound S [Et in compound P is ethyl group]

The product S is:

Q. An organic compound (A),

C_{8} H_{4} O_{3}

in dry benzene in the presence of anhydrous

{A l C l}_{3}

gives compound (B). The compound (B) on treatment with

{P C l}_{5}

followed by reaction with

H_{2} / P d ({B a S O}_{4})

gives compound (C) which on reaction with hydrazine gives a cyclised compound (D)

(C_{14} H_{10} N_{2})

. Identify (A), (B), (C), and (D). Explain the formation of (D) from (C).

Q. 1,4 Pentadiene reacts with excess of

H C l

in the presence of benzoyl peroxide to give compound

X

, which upon reaction with excess of

M g

in dry ether forms

Y

. Compound

Y

on treatment with ethyl acelate followed by treatment with dilute acid yields

Z

. Identify the structure of compounds

X, Y

and

Z

Toluene on heating with succinic anhydride in the presence of anhydrous followed by reduction with Zn - Hg/Con. HCl gives a product which on heating with thionyl chloride followed by heating with anhydrous $A l C l_{3}$ in $C S_{2}$ gives major product (A), so, the product (A) is:

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