The invention provides compounds of the general formula (I) ##STR1## and physiologically acceptable salts, solvates or non-toxic metabolically labile esters thereof where R.sup.1 represents a halogen atom; Ar represents the group ##STR2## R.sup.3 represents a C-linked tetrazolyl group; R.sup.4 and R.sup.5, which may be the same or different, each independently represent a hydrogen atom or a halogen atom or a C.sub.1-6 alkyl group; and Het represents an N-linked imidazolyl group optionally substituted at the 2-position. The compounds may be used in the treatment or prophylaxis of hypertension and diseases associated with cognitive disorders.
Imidazole-based pinanamine derivatives: Discovery of dual inhibitors of the wild-type and drug-resistant mutant of the influenza A virus
作者:Jianghong Dong、Shengwei Chen、Runfeng Li、Wei Cui、Haiming Jiang、Yixia Ling、Zifeng Yang、Wenhui Hu
DOI:10.1016/j.ejmech.2015.12.013
日期:2016.1
We previously reported potent hit compound 4 inhibiting the wild-type influenza A virus A/HK/68 (H3N2) and A/M2-S31N mutant viruses A/WS/33 (H1N1), with its latter activity quite weak. To further increase its potency, a structure-activity relationship study of a series of imidazole-linked pinanamine derivatives was conducted by modifying the imidazole ring of this compound. Several compounds of this series inhibited the amantadine-sensitive virus at low micromolar concentrations. Among them, 33 was the most potent compound, which was identified as being active on an amantadine-sensitive virus through blocking of the viral M2 ion channel. Furthermore, 33 markedly inhibited the amantadine-resistant virus (IC50 = 3.4 mu M) and its activity increased by almost 24-fold compared to initial compound, with its action mechanism being not M2 channel mediated. (C) 2015 Elsevier Masson SAS. All rights reserved.
A Versatile Route tosyn- andanti-α-Aminoβ-Hydroxy Esters fromβ-Keto Esters by Dynamic Kinetic Resolution with Ru-SYNPHOS® Catalyst
anti-α-amino β-hydroxyesters with high levels of selectivity by the use of Ru-SYNPHOS® catalysts is reported. The key transformations include asymmetric hydrogenations of α-N-substituted β-keto esters protected as α-amido or α-amino hydrochloride derivatives, respectively. The RuII-catalyzed hydrogenation of α-amino β-keto ester hydrochlorides affords the corresponding anti-α-amino β-hydroxyesters with high
Tandem C–N Bond Formation through Condensation and Metal-Free <i>N</i>-Arylation: Protocol for Synthesizing Diverse Functionalized Quinoxalines
作者:Yan-Xiao Jiao、Ling-Ling Wu、Hai-Miao Zhu、Jiang-Ke Qin、Cheng-Xue Pan、Dong-Liang Mo、Gui-Fa Su
DOI:10.1021/acs.joc.7b00011
日期:2017.4.21
Diverse functionalized quinoxalines were synthesized in good yields from arylamines and readily available β-keto oximes through condensation and metal-free N-arylation. The reaction was compatible with various functional groups, such as halides, cyano, and esters. A mechanism was proposed based on the experimental results. These quinoxalines were easily obtained on a gram scale and converted to various