A biocompatible inverse electron demand Diels–Alder reaction of aldehyde and tetrazine promoted by proline†
Abstract
A proline-mediated inverse electron demand Diels–Alder reaction of aldehyde and tetrazine is disclosed. This biocompatible reaction is very fast (with apparent k2 up to 13.8 M−1 s−1) and has been used in the labeling of bovine serum albumin in aqueous medium.