Devise a selective synthesis for each of the following, using the starting materials on the right to prepare the products on the left of the retrosynthetic arrow. All of the carbons in your product must originate from the pictured starting materials, but you may employ any other reagents you wish. Write the final synthesis as a series of forward reactions, showing all synthetic intermediates and reagents. You do not need to show arrow-pushing or mechanistic intermediates. 5steps