David A. Evans

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David A. Evans (January 11, 1941 – April 29, 2022) was an American chemist who was the Abbott and James Lawrence professor of chemistry at Harvard University. He was a prominent figure in the field of organic chemistry and his research focused on synthetic chemistry and total synthesis, particularly of large biologically active molecules. Among his best-known works is the development of aldol reaction methodology (for example, Evans' acyl oxazolidinone method).