Show how the following conversion can be achieved with good yield. Use any necessary reagents.

Reactions showing the formation of a Grignard reagent and subsequent steps.

Stepwise conversion of a brominated compound using PPh3 and BuLi to form a new compound.

Formation of a Grignard reagent from a brominated compound with subsequent reaction steps.

Stepwise conversion of a brominated compound using PPh3 and BuLi to yield a new product.