Propose a Grignard-based synthesis to accomplish the overalltransformation shown above. You must start from the given startingmaterial, and you must use CO2(s) in your Grignard reaction. Beyondthese restrictions, you may use any other necessary reagents. Thereis no need to show a retrosynthesis or the mechanism of any step,only the necessary reagents and the resultingintermediateproduct(s) for each step of your synthesis.
