Synthesis of Compound C

First react with Magnesium in Tetrahydrafurian (THF), and then use a ketone to add three carbons to the chain.. The hydroxyl group was replaced by bromine using PBr3  Then Na makes an alkyne anion, and adds an alkyl bromide. Lithium in ammonia forms the trans product. PBr3 replaces the hydroxyl group. Mg in THF and then water replaces bromine with hydrogen.

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