xrightarrow{{ROH/{H^ + }}} P (major organic p | vedclass

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Question

(B) The reaction of $3,4-dihydro-2H-pyran$ with an alcohol $(ROH)$ in the presence of an acid catalyst $(H^+)$ is a standard method for protecting alc

Vedclass · Accepted Answer

Tetrahydropyran$-2-$yl ether

Vedclass · Answer

(B) The reaction of $3,4-dihydro-2H-pyran$ with an alcohol $(ROH)$ in the presence of an acid catalyst $(H^+)$ is a standard method for protecting alcohols as tetrahydropyranyl $(THP)$ ethers.$1$. The acid catalyst protonates the double bond of the $3,4-dihydro-2H-pyran$ to form a stable resonance-stabilized oxocarbenium ion.$2$. The alcohol $(ROH)$ then acts as a nucleophile and attacks the electrophilic carbon of the oxocarbenium ion.$3$. Deprotonation yields the final product,which is a $2-alkoxytetrahydropyran$ (also known as a tetrahydropyran$-2-$yl ether).Thus,the major product $P$ is the tetrahydropyran$-2-$yl ether.

$\xrightarrow{{ROH/{H^ + }}}$ $P$ (major organic product)
The product $P$ is

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$\xrightarrow{{ROH/{H^ + }}}$ $P$ (major organic product) The product $P$ is