Fig. 1. Thiazolidino boronate (TzB) formation of cysteine. (a) Illustration of cysteine modification via thiazolidine formation. (b) Illustration of the boronic acid-accelerated cysteine modification to give a thiazolidino boronate (TzB) complex. (c) 1H-NMR data showcasing the fast and clean conjugation between 2-FPBA and l-cysteine. (d) Crystal structure of the TzB complex formed between 2-FPBA and l-cysteine.
