Discovery of Dual Target Inhibitors against Cyclooxygenases and Leukotriene A4 Hydrolyase
摘要:
Dual target inhibitors against COX-2. and LTA(4)H were designed by adding functional groups from a marketed COX-2 inhibitor, Nimesulide, to an existing LTA(4)H inhibitor 1-(2-(4-phenoxyphenoxy) ethyl) pyrrolidine. A series of phenoxyphenyl pyrrolidine compounds were synthesized and tested for their inhibition activities using enzyme assays and human whole blood assay. Introduction of small electron withdrawing groups like NO2 and CF3 in the ortho-position of the terminal phenyl ring was found to change the original single target LTA(4)H inhibitor to dual target LTA(4)H and COX-2 inhibitors. Compound 5a and 5m showed dual LTA(4)H and COX-2 inhibition activities in the enzyme assays and the I-EWE assay with IC50 values in the micromolar to submicromolar range. As their activities in HWB assay were comparable to the two starting single target inhibitors, the two compounds are promising for further studies. The strategy used in the current study may be generally applicable to other dual target drug designs.
Cyclodienones. X. Reaction of Halo-cyclohexadien-1-ones with Phenols in the Presence of α-Picoline and Preparation of 4-Hydroxy- and 2-Hydroxyphenyl Aryl Ethers
作者:Masashi Tashiro、Takashi Itoh、Gouki Fukata
DOI:10.1246/bcsj.57.416
日期:1984.2
Reaction of 4-halocyclohexadienones such as 4-bromo-(1a), 4-chloro-2,4,6-tri-t-butyl-(1b), 2,4-dichloro-4,6-di-t-butyl-2,5-cyclohexadien-1-one, and 2,4-dichloro-2,6-di-t-butyl-3,5-cyclohexadien-1-one with phenols in the presence of α-picoline was carried out under various conditions. The reaction of 1a and 1b with phenols afforded the corresponding 2-aryloxy-4,6-di-t-butyl phenols together with various
Carbamic acid compounds of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, X and Y are as hereinafter set forth, processes for their preparation, pesticidal compositions containing one or more of the carbamic acid compounds as the active ingredient and methods for using the pesticidal compositions for the control of pests, particularly insects, mites and nematodes, are described.
Carbamic acid compounds of the formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, X and Y are as hereinafter set forth, processes for their preparation, pesticidal compositions containing one or more of the carbamic acid compounds as the active ingredient and methods for using the pesticidal compositions for the control of pests, particularly insects, mites and nematodes, are described.
Solvent-switchable regioselective 1,2- or 1,6-addition of quinones with boronic acids
作者:Qi Xia、Yaxuan Zhou、Xiaoning Yang、Yanqiu Zhang、Jiayi Wang、Gonghua Song
DOI:10.1039/d3cc01968c
日期:——
An efficient copper-catalyzed solvent-switchable regioselective 1,2- or 1,6-addition of quinones with boronic acids has been developed. This novel catalytic protocol for the synthesis of various quinols and 4-phenoxyphenols was enabled by a simple solvent swap between H2O and MeOH. It features mild reaction conditions, simple and easy operation, broad substrate scope and excellent regioselectivity
已经开发出一种有效的铜催化溶剂可转换的醌与硼酸的区域选择性 1,2-或 1,6-加成反应。这种用于合成各种对苯二酚和 4-苯氧基苯酚的新颖催化方案是通过 H 2 O 和 MeOH 之间的简单溶剂交换实现的。其具有反应条件温和、操作简单易行、底物范围广、区域选择性优良等特点。还成功地研究了克级反应以及两种加成产物的进一步转化。