The product A in the following reaction is: | vedclass

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(A) The reaction involves the alkylation of an unsymmetrical ketone,$2$-methylcyclohexanone,using a strong,sterically hindered base,$LDA$ (Lithium dii

Vedclass · Accepted Answer

$2-$ethyl$-6-$methylcyclohexanone

Vedclass · Answer

(A) The reaction involves the alkylation of an unsymmetrical ketone,$2$-methylcyclohexanone,using a strong,sterically hindered base,$LDA$ (Lithium diisopropylamide). $LDA$ is a kinetic base that selectively removes a proton from the less sterically hindered $\alpha$-carbon. In $2$-methylcyclohexanone,there are two types of $\alpha$-carbons: one is the tertiary carbon (substituted with a methyl group) and the other is the secondary carbon ($-CH_2-$ group). $LDA$ removes a proton from the less hindered $-CH_2-$ $\alpha$-carbon to form the kinetic enolate. Subsequent reaction of this kinetic enolate with the alkylating agent,ethyl iodide $(CH_3-CH_2-I)$,leads to the alkylation at the less substituted $\alpha$-carbon. Therefore,the major product $A$ is $2$-ethyl-$6$-methylcyclohexanone.

$A$. Lucas reagent	$I$. $SnCl_2 + HCl$
$B$. Clemmensen reagent	$II$. $[Ag(NH_3)_2]^+$
$C$. Tollen's reagent	$III$. Anhydrous $ZnCl_2 + conc. HCl$
$D$. Stephen reagent	$IV$. $Zn-Hg/HCl$

The product $A$ in the following reaction is:

Similar Questions

In the given reaction,what will be $A$ and $B$ respectively?
$(CH_3)_2CO$ $\xrightarrow{NaCN/HCl} A$ $\xrightarrow{H_3O^+} B$

What is Schiff's reagent?

Match the following:
$A$. Lucas reagent $I$. $SnCl_2 + HCl$
$B$. Clemmensen reagent $II$. $[Ag(NH_3)_2]^+$
$C$. Tollen's reagent $III$. Anhydrous $ZnCl_2 + conc. HCl$
$D$. Stephen reagent $IV$. $Zn-Hg/HCl$

Arrange the following compounds in increasing order of their reactivity in nucleophilic addition reactions.
$(i)$ Ethanal,Propanal,Propanone,Butanone.
$(ii)$ Benzaldehyde,$p-$Tolualdehyde,$p-$Nitrobenzaldehyde,Acetophenone.
Hint: Consider steric effect and electronic effect.

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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