title: A fluorogenic aldehyde bearing a 1,2,3-triazole moiety for monitoring the progress of aldol reactions.
abstract: We have developed a new type of fluorogenic aldehyde bearing a 1,2,3-triazole moiety that is useful for monitoring the progress of aldol reactions through an increase in fluorescence. Whereas 6-methoxy-2-naphthaldehyde was highly fluorescent, the fluorogenic aldehyde, 4-formylbenzene connected to the 6-methoxy-2-naphthyl group through a 1,2,3-triazole moiety, was essentially nonfluorescent in aqueous solutions. We suggest that the 4-formylphenyl group acts as a quencher to suppress the fluorescence of the 6-methoxy-2-naphthyltriazole moiety. The product of the aldol reaction of this aldehyde does not have a quenching moiety and showed more than 800-fold higher fluorescence than the aldehyde. Assay systems using the fluorogenic aldehyde were validated by screening of aldol catalysts, ranking of the activities of the catalysts, and evaluation of reaction conditions.
authors.affiliation: Department of Molecular Biology, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
authors.forename: Hai-Ming
authors.initials: HM
authors.lastname: Guo
authors.forename: Fujie
authors.initials: F
authors.lastname: Tanaka
mesh_terms: D000447:Aldehydes / Q000737:chemistry*; D005453:Fluorescence; D055601:Organic Chemistry Phenomena; D014230:Triazoles / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D014230:Triazoles