Which acetylide ion and carbonyl are suitable for the synthesis of 2-methylhept-4-yn-3-ol?

Determine the mechanism of the synthesis that involves quenching with acid after the reaction of sodium acetylide and etiocholanolone.

Draw the product of the alkynide reaction given below.

What reagents are required to carry out the reaction shown below?

A student has made a mistake completing the following reaction equation. Identify and correct the error.

When the following ester is treated with excess acetylide ion and then pyridinium chloride, what type of product is expected?

What is the product of the acetylide alkylation reaction shown below? (Take note of the correct carbon count in the resulting product.)