Identify (B) in the following reaction sequen | vedclass

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(A) The reaction starts with oxidative cleavage of the cyclooctene ring using $O_3$ and $H_2O_2$. This breaks the double bond and converts the alkene

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(A) The reaction starts with oxidative cleavage of the cyclooctene ring using $O_3$ and $H_2O_2$. This breaks the double bond and converts the alkene into a dicarboxylic acid derivative. The starting material has a substituent $-CH(CH_2OH)_2$ on the ring. Oxidative cleavage of the cyclooctene ring yields a linear chain with a carboxylic acid group at the site of the original double bond and the original substituent remains. Specifically,the product $(A)$ is $HOCH_2-CH(CH_2OH)-CH_2-(CH_2)_5-COOH$. Upon heating with acid $(-H_2O, \Delta)$,an intramolecular esterification (lactonization) occurs between one of the primary hydroxyl groups $(-CH_2OH)$ and the carboxylic acid group $(-COOH)$ formed at the cleavage site. This forms a five-membered lactone ring. The correct structure is the one where the lactone ring is formed,leaving the other $-CH_2OH$ group and the remaining carboxylic acid chain intact as shown in option $(A)$.

Identify $(B)$ in the following reaction sequence:

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What are $X$ and $Y$ respectively in the following sets of reactions?
$I. \ CH_3CH_2CH_2OH \xrightarrow{PBr_3} X$
$II. \ CH_3CH=CH_2 \xrightarrow{HBr, (C_6H_5COO)_2} Y \text{ (major)}$

Compound $(X)$ will be:
Compound $(X) \xrightarrow[Pt]{5H_2} \text{Saturated compound}$
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Compound $(X) \xrightarrow[Me_2S]{O_3} OHC-CH_2-CH_2-CO-CHO + HOOC-CHO + HCOOH + OHC-CHO$

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