Peptide sequencing: The utility of chemical ionization mass spectrometry
作者:M. Mudgett、D. V. Bowen、F. H. Field、T. J. Kindt
DOI:10.1002/bms.1200040308
日期:1977.6
Chemicalionizationmassspectrometry is used at low resolution to determine the sequences of permethylated acetyl peptides. The method has been tested with 45 peptides, between 2 and 5 residues long, including examples of all of the common amino acids except cysteine and N-terminal asparagine. The isobutane chemicalionizationspectra contain three principal types of N-terminal sequence ion and one
SOLOMONAMIDE ANALOGUE COMPOUNDS, PHARMACEUTICALS CONTAINING SOLOMONAMIDE ANALOGUE COMPOUNDS, AND PROCESSES FOR THE PREPARATION THEREOF
申请人:COUNCIL OF SCIENTIFIC AND INDUSTRIAL RESEARCH
公开号:US20150291659A1
公开(公告)日:2015-10-15
Solomanamide analogues of Formula-I having anti-inflammatory activity, and viable synthetic routes for the preparation of such analogues, including the synthesis of macrocyclic core of Salomanamide analogues. The Solomanamide analogues of Formula-I or their pharmaceutical salt may be provided in a pharmaceutical composition and administered in an effective amount for the treatment of inflammation and/or pain.
Organophosphorus Analogues and Derivatives of the Natural L-Amino Carboxylic Acids and Peptides. VI. A Phospha<sup>C</sup>-Peptide Analogue of Plumbemycin A
作者:Ivan A. Natchev
DOI:10.1246/bcsj.61.4491
日期:1988.12
4-didehydro-5-(ethoxyhydroxyphosphinyl)norvaline (1) and 1-analyl-L-aspartic acid diethyl ester (2) is carried out by the DCC method to give the entirely protected phosphaC-tripeptide (3). Conditions for the enzyme-catalyzed hydrolysis of the ester groups with alkaline mesintericopeptidase, phosphodiesterase I, and α-chymotrypsin and the removal of the trifluoroacetyl group with an aqueous ammonia solution
已经研究了 Plumbemycin A 的 phosphaC 肽。N-三氟乙酰基-3,4-didehydro-5-(ethoxyhydroxyphosphinyl)norvaline (1) 和 1-analyl-L-天冬氨酸二乙酯 (2) 的缩合通过 DCC 方法进行,得到完全保护的磷酸三肽(3). 已经实现了用碱性间质间肽酶、磷酸二酯酶 I 和 α-胰凝乳蛋白酶催化水解酯基团以及用氨水溶液去除三氟乙酰基团的条件。
Organophosphorus Analogues and Derivatives of the Natural L-Amino Carboxylic Acids and Pep tides. IV. A Phospha<sup>C</sup>-Peptide Analogue of Plumbemycin A
作者:Ivan A. Natchev
DOI:10.1246/bcsj.61.4447
日期:1988.12
A condensation of 1,2-azaphosphorine 1 and the dipeptide 2 to the entirely protected phosphaC-tripeptide 3 was carried out by the DCC method. A high selectivity was achieved in the enzyme-catalyzed hydrolysis of the ethoxycarbonyl groups with alkaline mesintericopeptidase to 4 and of the peptide bond Ala–Asp with α-chymotrypsin to 5, which in acid-catalyzed hydrolysis releases the norvaline 6. Antitumor activity of the phosphaC-peptides 4 and 5 was found.