Irradiation of cyclopropenone-masked dibenzocyclooctynes with near-infrared pulses from a femtosecond laser triggers photodecarbonylation via nonresonant two- or three-photon excitation. Multiphoton-generated cyclooctynes undergo a SPAAC reaction with organic azides, yielding the expected triazoles. Multiphoton-triggered SPAAC (MP-SPAAC) enables high resolution 3-D photoclick derivatization of hydrogels and tissues.
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| http://dx.doi.org/10.1021/jacs.7b08472 | DOI Listing |
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