Postsynthetic Modification of Phenylalanine Containing Peptides by C–H Functionalization
作者:Myles J. Terrey、Carole C. Perry、Warren B. Cross
DOI:10.1021/acs.orglett.8b03536
日期:2019.1.4
New methods for peptide modification are in high demand in drug discovery, chemical biology, and materials chemistry; methods that modify natural peptides are particularly attractive. A Pd-catalyzed, C–H functionalization protocol for the olefination of phenylalanine residues in peptides is reported, which is compatible with common amino acid protecting groups, and the scope of the styrene reaction
A concept for the rational design of sequence-selectivepeptide receptors has been extended: in addn. to recognitionmodules for polar, arom. and basic amino acids, the series has now been completed with new receptor units for apolar and acidic amino acids. The underlying strategy uses the intermol. b-sheet stabilization of a dipeptide as a prerequisite to bind its N-terminal amino acid side chain
合理设计序列选择性肽受体的概念已得到扩展:另外。到 polar、arom 的识别模块。和碱性氨基酸,该系列现在已经完成了新的非极性和酸性氨基酸受体单元。底层策略使用 intermol。二肽的 b 片层稳定性,作为通过从受体部分突出的 U 形转弯末端的战略性放置的识别尖端结合其 N 端氨基酸侧链的先决条件。因此,二氨基吡唑已通过环状酰亚胺共价连接到肯普氏三酸,而间位取代的苯胺作为酰胺偶联到第三个羧酸酯悬垂臂上,形成两个芳基。在紧密的构象锁定中将单位转换为子范德华距离。核磁共振滴定,Karplus 分析和蒙特卡洛模拟证明了丙氨酸-contg 的有效序列选择性识别。二肽。以前不存在这样一组合理设计的肽受体的例子。
BOROPEPTIDE INHIBITORS OF ENTEROPEPTIDASE AND THEIR USES IN TREATMENT OF OBESITY, OVERWEIGHT AND/OR DISEASES ASSOCIATED WITH AN ABNORMAL FAT METABOLISM
申请人:Harosh Itzik
公开号:US20100311690A1
公开(公告)日:2010-12-09
The present invention relates to novel compounds, particularly derivatives of boroarginine, boroornithine and borolysine that selectively modulate, regulate, and/or inhibit enteropeptidase. The invention also relates to compositions, particularly pharmaceutical compositions, as well as methods to treat excess weight, obesity and diseases associated with an abnormal fat metabolism.
Acylation reactions mediated by tantalum carboxylates
作者:Kiran Joshi、Jiang Bao、Alan S. Goldman、Joachim Kohn
DOI:10.1021/ja00043a006
日期:1992.8
Facile nucleophilic attack on coordinated carboxylate ligands is reported: complexes of tantalum(V) react rapidly with amines and amino acid esters to give the corresponding amides. Cyclopentadienyltantalum(V) amino acid carboxylate complexes have been prepared and reacted with free amino acid esters to give dipeptides in good yield and with high stereochemical purity.
Fragmentation-Rearrangement of Peptide Backbones Mediated by the Air Pollutant NO<sub>2</sub><sup>.</sup>
作者:Luke F. Gamon、Joses G. Nathanael、Bethany I. Taggert、Fraser A. Henry、Jana Bogena、Uta Wille
DOI:10.1002/chem.201501850
日期:2015.10.12
consecutive aromatic side chains only gave products that resulted from nitrosation of the sterically less congested N‐terminal amide. Such backbone fragmentation–rearrangement occurs under physiologically relevant conditions and could be an important reaction pathway for peptides, in which sections without readily oxidizable side chains are exposed to the air pollutant NO2.. In addition to NO2.‐induced radical