Work on “an ingenious tool for building molecules” – click chemistry and bioorthogonal chemistry – yielded the 2022 Nobel Prize in Chemistry for a trio from Denmark and the US, the Royal Swedish Academy of Sciences announced on Wednesday. The award will be shared jointly between Carolyn Bertozzi of Stanford University, Morten Meldal of the University of Copenhagen, and K Barry Sharpless, of Scripps Research in California. The award honours their work in a field that allowed “molecular building blocks [to] snap together quickly and efficiently,” said the academy. Sharpless – who now has two Che…