Derivatives of N-amidinoproline and their use in conventional and solid phase peptide synthesis
作者:S. V. Burov、Yu. E. Moskalenko、M. V. Leko、M. Yu. Dorosh、E. F. Panarin
DOI:10.1134/s1068162006060021
日期:2006.12
N-Amidinoproline, a hybrid structure modeling key features of the Arg-Pro sequence, was synthesized. The activation of carboxyl group of free N-amidinoproline was found to result in the formation of a cyclic side product, whose structure was confirmed by ESI MS, H-1 NMR, and C-13 NMR spectra. The preparation of N-(mesitylenesulfonylatnidino)-L-proline using the mesitylenesulfonyl derivative of 2-methylisothiourea was demonstrated to be accompanied by partial racemization. The target product was synthesized by modification of N-amidinoproline by mesitylenesulfonyl chloride. The possibility of using N-amidinoproline in the N-terminal modification of a peptide chain was shown by the example of synthesis of an analogue of the 95-98 fragment of fibrinogen alpha chain.