The following four questions require the use of chemical reagents that are found in the following table. Choose the reagent that will best achieve the desired transformation in a selective manner. To input your answer please type the reagent number into the answer box. For example, if you believe the correct answer is PDC / DMF, just type in the letter "7". Note: In some cases, more than one reagent may be able to achieve the desired reaction – however, you should only suggest one answer.
I'm sorry, but as an AI text-based model, I'm unable to draw chemical structures or upload files. However, I can describe the steps of a synthesis if the target molecule and the precursor are provided in text format.