Methods for labeling a substrate using a hetero-Diels-Alder reaction are disclosed. The hetero-Diels-Alder reaction includes the reaction of an o-quinone methide (e.g., an o-naphthoquinone methide) with a polarized olefin to form a hetero-Diels-Alder adduct. The o-quinone methide or the polarized olefin can be attached to a surface of a substrate, and the other of the o-quinone methide or the polarized olefin can include a detectable label. The o-quinone methide can conveniently be generated by irradiation of a precursor compound, preferably in an aqueous solution, suspension, or dispersion.
本发明揭示了使用杂Diels-Alder反应标记底物的方法。杂Diels-Alder反应包括o-醌
甲烷(例如o-
萘醌
甲烷)与极性烯烃反应,形成杂Diels-Alder加合物。o-醌
甲烷或极性烯烃可以附着在底物的表面上,而另一个o-醌
甲烷或极性烯烃可以包含可检测的标签。o-醌
甲烷可以方便地通过辐照前体化合物(最好是在
水溶液、悬浮液或分散液中)产生。