Pyrylium-mediated transformations of natural products. Part 5. Reactions of gelatin and chymotrypsin with 4-(4-methoxy-3-sulphophenyl)-2,6-bis-(4-sulphophenyl)pyrylium perchlorate
- 1 January 1984
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Perkin Transactions 2
- No. 5,p. 875-878
- https://doi.org/10.1039/p29840000875
Abstract
The title pyrylium salt reacts with lysine residues in gelatin and chymotrypsin in aqueous buffer to form rapidly the corresponding divinylogous amide and pseudobase in a ratio depending on the protein concentration. First-order ring closure of the divinylogous amide proceeds at rates comparable to those observed with the analogous intermediate from free lysine.Keywords
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