An amino acid N-derivatising group that can be coloured on demand
作者:Andrew D. Abell、Derek C. Martyn、Barnaby C.H. May、Brent K. Nabbs
DOI:10.1016/s0040-4039(02)00625-1
日期:2002.5
A method is presented whereby an amino acid is reacted with 5-formyl-1H-pyrrole-2-carboxylic acid to give an N-derivatised tag that has a latent ability to be coloured. A characteristic red pyrrolizin-3-one (coloured tag) is then revealed on treatment with hydrocinnamoyl chloride. This sequence has been carried out on amino acids in solution, and on solid phase, and also on dipeptides.
Ring-deactivated hydroxyalkylpyrrole-based inhibitors of α-chymotrypsin: synthesis and mechanism of action
作者:Derek C. Martyn、Andrea J. Vernall、Bruce M. Clark、Andrew D. Abell
DOI:10.1039/b302411c
日期:——
13C NMR and mass spectrometry studies have been used to demonstrate that the inhibition of α-chymotrypsin by N-sulfonylhydroxymethylpyrrole inhibitors (10) is non-covalent. Hydroxyalkylpyrroles in which an electron-withdrawing group (acyl substituent) is introduced at the alternative C2 position have been synthesised and also shown to inactivate α-chymotrypsin. SAR studies on this class suggests that the incorporation of phenylalanine at C2 is favoured, however, there is little gain in introducing a hydrophobic substituent at C5.