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- A. B. 2. Propose an efficient synthesis for each of the following transformations using any additional reagentsDevise a synthesis of compound A from the given starting materials. You may use any other inorganic reagents or organic alcohols. A was used to prepare aliskiren, a drug used to treat hypertension (see also Problem 5.7). CH,0 NH2 OH но. CHO Br CH,0. H2N. CH;0 CH30 A CH,0 Br Br aliskirenDevise a synthesis of each compound from phenol (C6H5OH) and any other organic or inorganic reagents.