Subjective Type

How will you obtain the following from benzaldehyde? Cinnamic acid.

Solution

In Knoevenagel-Hans condensation reaction, cinnamic acid is prepared from benzaldehyde. The reactants for this are the corresponding benzaldehyde and malonic acid in the presence of a weak base, followed by acid hydrolysis.

SIMILAR QUESTIONS

Physical World

What is the name of the following reaction ? $$PhCHO+(CH_3CO)_2O\overset{Na(OAc)_2}{\rightarrow}PhCH=CHCO_2H$$

Physical World

Benzaldehyde reacts with ammonia to form:

Physical World

Which of the following will not give aldol condensation?

Physical World

State, whether the following statements are True or False: Benzaldehyde undergoes aldol condensation in alkaline medium.

Physical World

An organic compound (A) - $$C_6H_5-CHO$$. Action of $$NaOH$$ on (A) produces (B) and (C). (B) on controlled oxidation gives (A) which on further oxidation produces (C). (C) on distillation with $$PCl_5$$ gives (D). (D) reacts with aq. $$NH_3$$ giving (E) which reacts with $$NaOH$$ and $$Br_2$$ forming (F). The latter on reaction with hypo-phosphorus acid yields (H). Identify the compounds (B) to (H).

Physical World

Complete each synthesis by giving the missing starting material, reagent, or products.

Physical World

In what manner the following transformation might be carried out (in not more than six steps) ? 'Benzaldehyde to cyanobenzene'

Physical World

State, whether the following statements are True or False: Benzaldehyde gives red precipitate with Fehling's solution.

Physical World

Name the final product of the following reaction: Benzaldehyde reacts with hydrogen cyanide.

Physical World

How will you obtain the following from benzaldehyde? Cinnamaldehyde.

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