How would you synthesize the following compound using organic molecules with no more than three carbons? Hint: A protecting group will be required for the synthesis.

How would you synthesize the following compound using organic molecules with no more than four carbons and an alcohol-protecting group?

Illustrate the use of a protecting group in the synthesis of hex-4-yn-1-ol from 3-bromopropan-1-ol.

Propose a reaction scheme that includes protecting groups to make the following reaction successful.