Gastrin releasing peptide antagonists with improved potency and stability
摘要:
Gastrin releasing peptide (GRP) is a 27 amino acid peptide hormone which is homologous to the amphibian peptide bombesin. Two series of novel GRP antagonists were developed by C-terminal modification of N-acetyl-GRP-20-27 amide. Peptide derivatives within each series resist enzymatic degradation in serum and exhibit strong affinity for the GRP receptor. The first series of compounds replaces the Leu26-Met27 region of GRP with an alkyl ether moiety. One member of this series, N-acetyl-GRP-20-25-NH-[(S)-1-ethoxy-4-methyl-2-pentane], specifically blocked radiolabeled GRP binding with an IC50 of 6 nM. In the second series of antagonists the oxygen of the ether moiety is replaced with a methylene group, resulting in GRP antagonists which are equipotent to native GRP in receptor binding assays (IC50 = 2 nM) and are also resistant to proteolytic degradation in vitro. All of the C-terminally modified peptides tested blocked GRP-stimulated mitogenesis in Swiss 3T3 mouse fibroblasts. Representative compounds also blocked GRP-induced elevation of [Ca2+]i in human SCLC cells, and inhibited GRP-independent release of gastrin in vivo.
DOI:
10.1021/jm00111a027
作为产物:
描述:
2-甲基-4-辛酮 、 氰基硼氢化钠 、 乙酸铵 在
氩 作用下,
以
甲醇 为溶剂,
反应 16.0h,
以to give 2-methyl-4-aminooctane (1.6 g, 25%) as a yellow oil的产率得到2-methyl-4-aminooctane
参考文献:
名称:
Certain sulfonamide heterobicyclic platelet activating factor antagonists
Overcoming the Limitations of γ- and δ-C–H Arylation of Amines through Ligand Development
作者:Yan-Qiao Chen、Zhen Wang、Yongwei Wu、Steven R. Wisniewski、Jennifer X. Qiao、William R. Ewing、Martin D. Eastgate、Jin-Quan Yu
DOI:10.1021/jacs.8b07109
日期:2018.12.26
improves the γ-methylene arylation of alkyl amines, extending the coupling partners to a wide range of medicinally important heteroaryl iodides and even previously unreactive heteroaryl bromides. The combination of an appropriate transientdirectinggroup and pyridone ligand has also enabled the δ-arylation of alkyl amines. Notably, our transientdirectinggroup design reveals the importance of matching
Certain sulfonamide heterobicyclic platelet activating factor antagonists
申请人:British Bio-Technology Limited
公开号:US05180723A1
公开(公告)日:1993-01-19
Compounds of general formula I; ##STR1## wherein: A.sup.1 is .dbd.N--, .dbd.CH-- or .dbd.CR.sup.1 --; A.sup.2 is .dbd.N--, .dbd.CH-- or .dbd.CR.sup.2 --; provided that, when one of A.sup.1 and A.sup.2 is a nitrogen atom, the other of A.sup.1 and A.sup.2 is other than a nitrogen atom; wherein the other variables are as defined in the specification and their pharmaceutically and veterinarily acceptable acid addition salts and hydrates are antagonists of platelet activating factor (PAF) and as such are useful in the treatment or amelioration of various diseases or disorders mediated by PAF.
Production of certain imidazopyridinyl-methyl-benzene sulfonamides
申请人:British Bio-Technology Limited
公开号:US05276153A1
公开(公告)日:1994-01-04
Compounds of general formula I; ##STR1## wherein: A.sup.1 is .dbd.N--, .dbd.CH-- or .dbd.CR.sup.1 --; A.sup.2 is .dbd.N--, .dbd.CH-- or .dbd.CR.sup.2 --; provided that, when one of A.sup.1 and A.sup.2 is a nitrogen atom, the other of A.sup.1 and A.sup.2 is other than a nitrogen atom; wherein the rest of the variables are defined in the specification; and their pharmaceutically and veterinarily acceptable acid addition salts and hydrates are antagonists of platelet activating factor (PAF) and as such are useful in the treatment or amelioration of various diseases or disorders mediated by PAF.