Ronald Breslow

Ronald Charles Drake Breslow (March 14, 1931 – October 25, 2017) was an American chemist. He was University Professor at Columbia University. He had taught at Columbia since 1956 and was a former chair of the university's chemistry department. He was interested in the design and synthesis of new molecules with interesting properties, and the study of these properties. 
He was a member of the National Academy of Sciences, the American Academy of Arts and Sciences, the European Academy of Sciences, and the American Philosophical Society.
Breslow died of pancreatic cancer in New York City on October 25, 2017 at the age of 86.