[EN] DISLODGEMENT AND RELEASE OF HSC USING ALPHA 9 INTEGRIN ANTAGONIST AND CXCR4 ANTAGONIST [FR] DÉLOGEMENT ET LIBÉRATION DES CSH À L'AIDE D'UN ANTAGONISTE DE L'INTÉGRINE ALPHA 9 ET D'UN ANTAGONISTE DE CXCR4
Tandem deprotection/coupling for peptide synthesis in water at room temperature
作者:Margery Cortes-Clerget、Jean-Yves Berthon、Isabelle Krolikiewicz-Renimel、Laurent Chaisemartin、Bruce H. Lipshutz
DOI:10.1039/c7gc01575e
日期:——
A tandem deprotection/coupling sequence is reported for solution-phasepeptidesynthesis in water under micellar catalysis conditions using the designer surfactant TPGS-750-M. Cbz deprotection followed by peptide coupling in the presence of COMU and 2,6-lutidine afforded polypeptides containing up to 10 amino acid residues. A broad scope characterizes this new technology. No epimerization has been
We report a new late‐stage functionalization of small peptides and cyclopeptides relying on the Negishi cross‐coupling of readily prepared iodotyrosine‐ or iodophenylalanine‐containing peptides with aryl‐, heteroaryl‐, and alkylzinc pivalates or halides. In silico and in vitro determinations of membrane permeability parameters of the modified cyclopeptides showed that in most cases, the solubility
Synthese und biologische Aktivit�t von gesch�tzten Polypeptidsequenzen des ?-Melanophoren-stimulierenden Hormons (?-MSH) des Rindes. Vorl�ufige Mitteilung
The synthesis of beef β-MSH (I) carrying protecting groups on Nα (carbobenzoxy-), Nε (tosyl-), β-COOH (Asp1 with β-CONH2, Asp18 with β-COOCH3), γ-COOH (Glu8 with γ-CONH2), and α-COOH (Asp18 with β-COOCH3) is described. The compound elicits an activity (in vitro, frog skin) of 1.4 × 107 U/g as compared to 1.2 × 109 U/g for βb-MSH and 3.7 × 107 U/g for αb-ACTH.
牛肉的合成β-MSH(I)上携带保护基Ñ α(carbobenzoxy-),N ε(甲苯磺酰基),β-COOH(天冬氨酸1与β-CONH 2,ASP 18与β-COOCH 3),γ -COOH(谷氨酸8与γ-CONH 2),和α-COOH(天冬氨酸18与β-COOCH 3)进行说明。该化合物引起的活性(在体外的1.4×10,蛙皮)7相比U / g至1.2×10 9 U /克为β b -MSH和3.7×10 7为αU /克b -ACTH。
The discovery of small molecule carbamates as potent dual α4β1/α4β7 integrin antagonists
作者:Linda L. Chang、Quang Truong、Richard A. Mumford、Linda A. Egger、Usha Kidambi、Kathryn Lyons、Ermengilda McCauley、Gail Van Riper、Stella Vincent、John A. Schmidt、Malcolm MacCoss、William K. Hagmann
DOI:10.1016/s0960-894x(01)00710-7
日期:2002.1
The alpha(4)beta(1) and alpha(4)beta(7) integrins are implicated in several inflammatory disease states. Systematic SAR studies of an alpha(4)beta(1)-specific arylsulfonyl-Pro-Tyr lead led to the identification of a new alpha(4)beta(7) binding site, best captured by O-carbamates of Tyr for this structural class. Several compounds showed a 200- to 400-fold improvement in alpha(4)beta(7) binding affinity while maintaining subnanomolar alpha(4)beta(1) activity, for example 21, VCAM-Ig alpha(4)beta(1) IC50 = 0.13 nM. VCAM-Ig alpha(4)beta(7) IC50 = 1.92 nM. (C) 2002 Elsevier Science Ltd. All rights reserved.
Arens, Festschrift A. Stoll <Basel 1957> S. 468, 471