Chapter 1. Total synthesis of Fumonisin B1 Chapter 2. Synthesis of Unnatural Sphingolipids: 1-deoxy-5-hydroxysphinganine and its diastereomers Chapter 3. Development of Methodology: Synthesis of cis- and trans-homoallylic alcohols Chapter 4. Human Milk Oligosaccharides: Synthesis of Natural and Unnatural oligomers