Answer
Ei-ichi Negishi passed away on June 6, 2021, at the age of 82. He was a Japanese chemist who was awarded the Nobel Prize in Chemistry in 2010 for his work on palladium-catalyzed cross-couplings in organic synthesis. Negishi's research has had a significant impact on the field of organic chemistry, and his methods are now widely used in the synthesis of complex organic molecules.