combined use of molar Kerr constants and electric dipole moments allows the determination of the major conformers of bis(2-R-benzimidazol-1-yl)methanes. For R = methyl and ethyl, conformers A (trans-trans-anti) and C (cis-cis-anti) are present, whereas for R = adamant-1-yl, the equilibrium involves conformers A and B (trans-cis-anti). In the case of R = t-butyl, the three conformations are present. It is
摘要 摩尔克尔常数和电偶极矩的结合使用可以确定双(2-R-苯并咪唑-1-基)甲烷的主要构象异构体。对于 R = 甲基和乙基,存在构象 A(反-反-反)和 C(顺-顺-反),而对于 R = 金刚烷-1-基,平衡涉及构象 A 和 B(反-顺-反)反对)。在 R = t-丁基的情况下,存在三种构象。可以根据 Taft 的 E0s 空间参数合理化这些比例。
2-Alkyl substituted benzimidazoles as a new class of selective AT2 receptor ligands
作者:Tamal Roy、Nadia N. Petersen、Greeshma Gopalan、Johan Gising、Mathias Hallberg、Mats Larhed
DOI:10.1016/j.bmc.2022.116804
日期:2022.7
comprising a benzimidazole rather than the imidazole ring that is common in AT2R ligands e.g. in the AT2R agonist C21, can provide both high affinity and receptor selectivity. In particular, compounds encompassing benzimidazoles, substituted in the 2-position with small bulky groups such as an isopropyl (Ki = 4.0 nM) or a tert-butyl (Ki = 5.3 nM) or alternatively a thiazole heterocycle (Ki = 5.1 nM)
包含苯并咪唑而不是在AT 2 R 配体例如AT 2 R 激动剂C21 中常见的咪唑环的配体可以提供高亲和力和受体选择性。特别地,包括苯并咪唑的化合物,在 2 位被小体积基团取代,例如异丙基 ( K i = 4.0 nM) 或叔丁基 ( K i = 5.3 nM) 或噻唑杂环 ( K i = 5.1 nM) 表现出高亲和力和 AT 2 R 选择性。AT 1中的正丁基链R 选择性沙坦,使配体的受体选择性降低。迄今为止报道的大多数 AT 2 R 选择性配体中存在的联芳基支架上的异丁基最初来源于非选择性强效 AT 1 R/AT 2 R 配体 L-162,313。值得注意的是,在本文讨论的所有配体中,异丁基被正丙基取代,并且提供了对AT 2 R具有高亲和力的配体,此外它们中的大多数表现出良好的AT 2 R/AT 1 R选择性。在不同位置引入氟原子对亲和力数据没有明显影响。带有噻唑或叔叔的配体连接到
Free radical alkyldesulfonation of benzimidazole-2-sulfonic acid