Discovery of long-wavelength photoactivatable diaryltetrazoles for bioorthogonal 1,3-dipolar cycloaddition reactions

Several long-wavelength (365 net) photoactivatable diaryltetrazoles were discovered by screening a series of substituted diaryltetrazoles and subsequently showed excellent reactivity in the photoactivated 1,3-dipolar cycloaddition reactions toward electron-deficient and conjugated alkenes in organic solvents as well as an alkene-containing protein in the aqueous buffer.