Karl Barry Sharpless

Karl Barry Sharpless (born 1941) is an American chemist known for his work in asymmetric synthesis and click chemistry, which are pivotal in drug development and organic synthesis. He was awarded the Nobel Prize in Chemistry twice, first in 2001 for his work on enantioselective reactions and again in 2022 for his contributions to the development of click chemistry, illustrating his significant impact on the field of chemistry.