Synthesis and evaluation of isoleucine derived angiotensin II AT2 receptor ligands
摘要:
Sixteen new C-terminally modified analogues of 2, a previously described potent and selective AT(2)R ligand, were designed, synthesized and evaluated for their affinity to the AT(2)R receptor. The introduction of large, hydrophobic substituents was shown to be beneficial and the most active compound (17, K-i = 8.5 mu M) was over 12-times more potent than the lead compound 2. (C) 2014 Published by Elsevier Ltd.
Synthesis and evaluation of isoleucine derived angiotensin II AT2 receptor ligands
摘要:
Sixteen new C-terminally modified analogues of 2, a previously described potent and selective AT(2)R ligand, were designed, synthesized and evaluated for their affinity to the AT(2)R receptor. The introduction of large, hydrophobic substituents was shown to be beneficial and the most active compound (17, K-i = 8.5 mu M) was over 12-times more potent than the lead compound 2. (C) 2014 Published by Elsevier Ltd.
The Synthesis of a Corrole Analogue of Aquacobalamin (Vitamin B<sub>12a</sub>) and Its Ligand Substitution Reactions
作者:Caitlin F. Zipp、Joseph P. Michael、Manuel A. Fernandes、Sadhna Mathura、Christopher B. Perry、Isabelle Navizet、Penny P. Govender、Helder M. Marques
DOI:10.1021/ic5000793
日期:2014.5.5
The synthesis of a Co(III) corrole, [10-(2-[[4-(1H-imidazol-1-ylmethyl)benzoyl]amino]phenyl)-5,15-diphenylcorrolato]cobalt(III), DPTC-Co, bearing a tail motif terminating in an imidazole ligand that coordinates Co(III), is described. The corrole therefore places Co(III) in a similar environment to that in aquacobalamin (vitamin B12a, H2OCbl+) but with a different equatorial ligand. In coordinating
Co(III)钴,[10-(2-[[4-(1 H-咪唑-1-基甲基)苯甲酰基]氨基]苯基)-5,15-二苯基Corrolato]钴(III),DPTC-的合成描述了带有终止于与Co(III)配位的咪唑配体的尾部基序的Co。因此,该钴将Co(III)置于与水钴胺(维生素B 12a,H 2 OCbl +)类似的环境中,但具有不同的赤道配体。在配位溶剂中,DPTC-Co是五配位和六配位物质的混合物,溶剂分子占据了向近端咪唑配体的轴向配位位点。在80:20的MeOH / H 2 O溶液中,陈化大约1小时,主要的物种是六配位水族物种[H 2O–DPTC-Co]。至少为60μM浓度时它是单体的。配位的H 2 O具有ap K a= 9.76(6)。在相同条件下,H 2 OCbl +具有ap K a = 7.40(2)。据报道,外源性配体取代配体H 2 O的平衡常数为中性N-,P-和S-供体配体以及CN –,NO
Iron-Porphyrin NO Complexes with Covalently Attached N-Donor Ligands: Formation of a Stable Six-Coordinate Species in Solution
作者:Timothy C. Berto、V. K. K. Praneeth、Lauren E. Goodrich、Nicolai Lehnert
DOI:10.1021/ja904368n
日期:2009.12.2
including UV-vis absorption, EPR, and IR spectroscopy. Both the N-O stretching frequency and the imidazole (14)N hyperfine coupling constants show a good correlation with the Fe-(N-donor) bond strength in these systems. The complexes with covalently attached pyridyl and alkyl imidazole ligands only exhibit weak interactions of the linker with iron(II). However, the stable six-coordinate complex [Fe(To-F(2)PP-BzIM)(NO)]
已经合成了一系列具有共价连接的 N 供体配体(吡啶或咪唑接头)的取代四苯基卟啉型大环化合物(TMP 或 To-F(2)PP)。具有不同链长和设计的接头已被用于系统地研究链长和刚度对接头与相应 Fe(II)-NO 血红素复合物的结合亲和力的影响。使用各种光谱方法(包括 UV-vis 吸收、EPR 和 IR 光谱)在溶液中监测接头的结合。在这些系统中,NO 拉伸频率和咪唑 (14)N 超精细耦合常数都显示出与 Fe-(N-供体) 键强度的良好相关性。具有共价连接的吡啶基和烷基咪唑配体的复合物仅表现出接头与铁 (II) 的弱相互作用。然而,当应用刚性苄基接头时,获得稳定的六配位络合物 [Fe(To-F(2)PP-BzIM)(NO)] (4)。该复合物表现出六配位亚铁血红素亚硝基的典型特性,其中 N 供体配体与 NO 结合,包括 427 nm 处的 Soret 带和 EPR 光谱中典型的九线 (14)
Synthesis of a New Class of Druglike Angiotensin II C-Terminal Mimics with Affinity for the AT<sub>2</sub> Receptor
histidine-related scaffolds were synthesized and introduced in the tripeptides to give eight new peptidomimetic structures. Three of the new peptide-derived druglike molecules exhibited selective, nanomolar affinity for the AT2 receptor. These ligands may become lead compounds in the future development of novel classes of selective AT2 receptor agonists.
Synthesis and evaluation of isoleucine derived angiotensin II AT2 receptor ligands
作者:Jean-Baptiste Veron、Advait Joshi、Charlotta Wallinder、Mats Larhed、Luke R. Odell
DOI:10.1016/j.bmcl.2013.12.040
日期:2014.1
Sixteen new C-terminally modified analogues of 2, a previously described potent and selective AT(2)R ligand, were designed, synthesized and evaluated for their affinity to the AT(2)R receptor. The introduction of large, hydrophobic substituents was shown to be beneficial and the most active compound (17, K-i = 8.5 mu M) was over 12-times more potent than the lead compound 2. (C) 2014 Published by Elsevier Ltd.