This conversion can be achieved by:

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(B) The conversion involves the alkylation of a terminal alkyne. First,$NaNH_2$ (sodium amide) acts as a strong base to deprotonate the terminal alkyn

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$NaNH_2, CH_3-CH_2-CH_2-Br$

Vedclass · Answer

(B) The conversion involves the alkylation of a terminal alkyne. First,$NaNH_2$ (sodium amide) acts as a strong base to deprotonate the terminal alkyne,forming a nucleophilic sodium alkynide salt. Second,this alkynide ion undergoes an $S_N2$ reaction with a primary alkyl halide,such as $CH_3-CH_2-CH_2-Br$ (propyl bromide),to extend the carbon chain and form the desired internal alkyne product.

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