Spectral analysis of a series of partially protected and deprotected tetrapeptides, analogues of AS-I phytotoxin期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Spectral analysis of a series of partially protected and deprotected tetrapeptides, analogues of AS-I phytotoxin

Authors:	V. Magafa Dr. G. Stavropoulos A. Aaberg M. Liakopoulou-Kyriakides

Affiliation:	(1) Department of Chemistry, University of Patras, GR-26500 Patras, Greece;(2) Department of Chemistry, University of Bergen, Bergen, Norway;(3) Department of Chemical Engineering, Section of Chemistry, Aristotle University, Thessaloniki, Greece

Abstract:	Summary A series of six tetrapeptides, analogues of AS-I phytotoxin, pathogenic to sunflower, have been synthesized either in solution and/or by solid phase methods and have been tested for phytotoxic activity in various plants and cytotoxic activity in three cancer cell lines. These peptides were identified as model compounds by fast atom bombardment (FAB), plasma desorption (PD), electrospray ionization (ESI) mass spectrometry and by¹H,¹H-¹H,¹³C and¹H-¹³C NMR. The data presented show that in protected tetrapeptides the molecular ion was easily identified whereas some difficulties appeared with the fully deprotected peptides. NMR spectra are given.

Keywords:	Amino acids Phytotoxin AS-I analogues FAB PD ESI mass spectrometry ¹H,¹³C and 2D NMR
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