Biorenewable chemicals in organic synthesis: Applications of methyl coumalate and nitroquinones
Date
Authors
Major Professor
Advisor
Committee Member
Journal Title
Journal ISSN
Volume Title
Publisher
Authors
Research Projects
Organizational Units
The Department of Chemistry seeks to provide students with a foundation in the fundamentals and application of chemical theories and processes of the lab. Thus prepared they me pursue careers as teachers, industry supervisors, or research chemists in a variety of domains (governmental, academic, etc).
History
The Department of Chemistry was founded in 1880.
Dates of Existence
1880-present
Related Units
- College of Liberal Arts and Sciences (parent college)
Journal Issue
Is Version Of
Versions
Series
Department
Abstract
Methyl coumalate is a bio-renewable material derived from malic acid. In the first chapter, we focused on the Diels-Alder reaction of methyl coumalate with a variety of dienophiles, including enamines, magnesium salts of indoles and hydroxyquinones. Some provided the bicyclic lactone intermediates, which could be further transformed into aromatic esters by acid/base catalyzed ring opening reactions. Others went through a Diels-Alder/retro Diels-Alder cascade and the carbon dioxide was extruded, affording the corresponding products. As a result, isophthalates, naphthalates and anthraquinone derivatives were successfully synthesized according to this strategy. The natural product Tomichaedin was also synthesized in over 40% yield.
In the second chapter, we have developed a method to in situ generate nitroquinone, and a variety of nucleophiles were tested for the conjugate addition. Substituted nitroquinones can be synthesized in moderate yield via a 1,4-addition – tautomerization cascade. Nucleophiles including indoles, electron rich aromatics and heterocycles all showed good reactivity. Additionally, a divergent synthesis towards Lagumycin and Phenathroviridone skeleton was proposed.