The product of the reaction is:

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The reaction involves the nucleophilic ring opening of an epoxide by a Grignard reagent $(RMgX)$.In an unsymmetrical epoxide,the nucleophile $(R^-

Vedclass · Accepted Answer

The product is $Ph-CH_2-CH(OH)-CH(R)-CH_3$

Vedclass · Answer

(A) The reaction involves the nucleophilic ring opening of an epoxide by a Grignard reagent $(RMgX)$.In an unsymmetrical epoxide,the nucleophile $(R^-)$ attacks the less sterically hindered carbon atom.The epoxide is $1-phenyl-2,3-epoxybutane$ (or $2-methyl-3-benzyloxirane$).The carbon atom attached to the $CH_3$ group is less sterically hindered compared to the carbon atom attached to the $PhCH_2$ group.Therefore,the $R$ group attacks the carbon atom bearing the $CH_3$ group.After the attack,the $O^-$ is protonated by $H_3O^+$ to form an alcohol.The resulting product is $1-phenyl-3-substituted-butan-2-ol$,which is $Ph-CH_2-CH(OH)-CH(R)-CH_3$.

Similar Questions

In the following sequence of reaction,$Z$ $\xrightarrow{PCl_5} X$ $\xrightarrow[\Delta]{\text{Alc. KOH}} Y$ $\xrightarrow{H_2O/H^{+}} Z$ (Major),$Z$ is:

In the given reaction,find the value of $x$,where $x$ is the number of moles of acetic anhydride $(Ac_2O)$ consumed.

Which of the following forms $2-$Methylbut$-2-$ene on heating with concentrated sulphuric acid?

By distilling glycol with fuming sulphuric acid,which of the following is obtained?

Lucas test is associated with

Vedclass Test Series

Exam Paper Generator

Online Exam Module