The final product of the following reaction s | vedclass

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(C) The reaction sequence is as follows: $1.$ Formation of Grignard reagent: $(CH_3O)_2CH-CH_2-CH_2-CH_2-Br + Mg \rightarrow (CH_3O)_2CH-CH_2-CH_2-CH_

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$H-CO-CH_2-CH_2-CH_2-CH_2OH$

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(C) The reaction sequence is as follows: $1.$ Formation of Grignard reagent: $(CH_3O)_2CH-CH_2-CH_2-CH_2-Br + Mg \rightarrow (CH_3O)_2CH-CH_2-CH_2-CH_2-MgBr$ $2.$ Nucleophilic addition to formaldehyde: $(CH_3O)_2CH-CH_2-CH_2-CH_2-MgBr + H_2C=O \rightarrow (CH_3O)_2CH-CH_2-CH_2-CH_2-CH_2-OMgBr$ $3.$ Acidic hydrolysis and deprotection: $(CH_3O)_2CH-CH_2-CH_2-CH_2-CH_2-OMgBr \xrightarrow[heat]{H_3O^{+}} OHC-CH_2-CH_2-CH_2-CH_2OH$ In the final step,the acetal group $(CH_3O)_2CH-$ is hydrolyzed to an aldehyde group $OHC-$,and the alkoxide group is hydrolyzed to a primary alcohol $-CH_2OH$. The final product is $OHC-CH_2-CH_2-CH_2-CH_2OH$ ($5$-hydroxypentanal).

The final product of the following reaction sequence is: $(CH_3O)_2CH-CH_2-CH_2-CH_2-Br$ $\xrightarrow{Mg}$ $\xrightarrow{H_2C=O}$ $\xrightarrow[heat]{H_3O^{+}}$

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