The given reaction
C_6H_5-CHO + Br-CH_2-COOC | vedclass

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Question

(C) The reaction of an aldehyde or ketone with an $\alpha$-bromo ester in the presence of metallic $Zn$ followed by hydrolysis and dehydration is know

Vedclass · Accepted Answer

Reformatsky reaction

Vedclass · Answer

(C) The reaction of an aldehyde or ketone with an $\alpha$-bromo ester in the presence of metallic $Zn$ followed by hydrolysis and dehydration is known as the Reformatsky reaction.
In this reaction,an organozinc intermediate is formed,which then reacts with the carbonyl group to yield a $\beta$-hydroxy ester,which upon heating $(\Delta)$ undergoes dehydration to form an $\alpha,\beta$-unsaturated ester.
Therefore,the given reaction is the Reformatsky reaction.

The given reaction
$C_6H_5-CHO + Br-CH_2-COOC_2H_5 \xrightarrow[(ii) HOH/NH_4Cl, (iii) \Delta]{(i) Zn} C_6H_5-CH=CH-COOC_2H_5$
is known as:

Similar Questions

Which reagent gives an orange-coloured precipitate with acetaldehyde?

$CaOCl_2 + H_2O \longrightarrow Ca(OH)_2 + X$
$X + CH_3CHO \longrightarrow Y$
$Y + Ca(OH)_2 \longrightarrow CHCl_3$
What is '$Y$'?

Describe the various chemical reactions of aldehyde and ketone compounds.

When aldehydes or ketones are treated with $C_6H_5-NH-NH_2$ (phenylhydrazine),the product formed is:

The reagent$(s)$ which can be used to bring about the following transformation is(are):
$(A)$ $LiAlH_4$ in $(C_2H_5)_2O$
$(B)$ $BH_3$ in $THF$
$(C)$ $NaBH_4$ in $C_2H_5OH$
$(D)$ Raney $Ni / H_2$ in $THF$

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The given reaction $C_6H_5-CHO + Br-CH_2-COOC_2H_5 \xrightarrow[(ii) HOH/NH_4Cl, (iii) \Delta]{(i) Zn} C_6H_5-CH=CH-COOC_2H_5$ is known as: