Aspects of chemical evolution: XVIIth Solvay Conference on by Gregoire Nicolis

By Gregoire Nicolis

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Synthesis: Adv. Asymm. Synth. , Proteins 27, 1- 101 (1996)mSpec. Chem. 19, 10 (1999) (large scale synthesis). 2-Aminoadipic acid (2-aminohexanedioic acid, ho- moglutamic acid). 16, mp. ), [a];' +23" (6 m HCI). Non-proteinogenic amino acid, the free (2s) form is widely distributed in small amounts in plants and fungi. (2R)-Form: component of the *cephalosporins C and N. Monohydrate, mp. ), [a]:' -25" (5 m HCI). A. is an intermediate product of lysine catabolism. : Synthesis: J. Org. Chem. 59, 3676 (1994).

I. , carboxy and amino groups are linked through a common a-carbon atom. In relation to this carbon atom there are two optically active stereoisomers, L- and D-, with the exception of glycine. The majority of the naturally occurring A. belongs to the L-series. A. are components of all proteins in which they are linked by peptide bonds, -CO-NH-. There are 20 proteinogenic A,: 1) those with nonpolar side chains: *glycine (Gly, G), L-*alanine (Ala, A), L*L-valine (Val, V), L-*leucine (Leu, L), L-*isoleucine (Ile, I), L-*L-proline (Pro, P), L-*tryptophan (Trp, W), L-*phenylalanine (Phe, F), L-*methionine (Met, M).

Was registered in Europe for treatment of mild forms of Alzheimer’s disease 2. , p. 241-246. ’Manufacturing Chemist, R = a H. p OH : Galanthamine R=O : Narwedine Norbelladine No. 2 (1999). gem: Acta Crystallogr. Sect. ) 3, 748-750; 5, 213-218. J. Org. Chem. 83- 164; . . 6,79-84(1989); 9,183-191 (1992); 10,291-299(1993); 11,329-332(1994) Rodd’s Chem. Carbon Compds. ) 4B, 165-249 (1997). ). ) A 1, 382. - Synthesis: J. Heterocycl. Chem. 32, 195 (1995) (galanthamine). J. Am. Chem. Sac. 106,6431 ff.

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