1. (a) Formulate four(4) different ways to synthesize 3-methylhexane from any readily available starting material. For each of these, show the reagent(s) required for each transformation, including all intermediates. (b) H.C. Brown used ester (2A) to test a new reducing agent which did indeed form alcohol (2B). How might he have made the ester (2A) from benzene. 2A C2Me NaBH4 AICI 3 CI 2B CH₂OH (c) Suggest synthesis for the target molecules (3A) and (3B) needed as intermediates. TM (3A) in the synthesis of brominated hydroxybenzoic acids and TM (3B) in the synthesis of model compounds for studying biological mechanisms of ester hydrolysis. OH CO₂ CHO O₂N Br

Branch of chemistry concerned with the study of carbon-based compounds, also known as organic compounds. These compounds form due to carbon's notable potential in forming chemical bonds. Due to the abundance of organic compounds on Earth, organic chemistry is crucial in other scientific disciplines, including materials science and pharmaceutical science.