Which combination of alkyl bromide and epoxid | vedclass

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(B) The target product is $1-	ext{cyclopentylbutan}-2-	ext{ol}$. To synthesize this,we need to add a nucleophile to an epoxide. The Grignard reagent

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(B) The target product is $1-	ext{cyclopentylbutan}-2-	ext{ol}$. To synthesize this,we need to add a nucleophile to an epoxide. The Grignard reagent derived from cyclopentylmethyl bromide is $	ext{cyclopentylmethylmagnesium bromide}$ $(	ext{cyclopentyl-CH}_2	ext{MgBr})$. When this reacts with propylene oxide (methyloxirane),the nucleophilic $	ext{CH}_2$ group attacks the less sterically hindered carbon of the epoxide ring. This results in the formation of the desired alcohol. The reaction is: $	ext{Cyclopentyl-CH}_2	ext{MgBr} + 	ext{propylene oxide}$ $ightarrow 	ext{Cyclopentyl-CH}_2	ext{CH}_2	ext{CH(OH)CH}_3$. This corresponds to option $(b)$.

Which combination of alkyl bromide and epoxide can be used to prepare the following product by addition of the Grignard reagent derived from the alkyl bromide to the epoxide?

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