Synthesis of 6-substituted 5-cyano-7-hydroxy-2-carboxybenzofurans
摘要:
Methods for the synthesis of 5-cyano-7-hydroxy-2-carboxybenzofurans bearing a variety of substituents at the 6-position are outlined. The scope and limitations of lithiation processes, electrophilic substitutions, and pericyclic reactions are investigated. (C) 2010 Elsevier Ltd. All rights reserved.
with an IC50 value of 0.41 μΜ. Results of inhibition kinetics studies and molecular docking simulations demonstrate that both 3 h and 4 a can bind to multiple sites on hCES2A, functioning as mixed inhibitors. Structure−activity relationship analysis revealed that the lactam moiety on the B ring is crucial for specificity towards hCES2A, while a benzyloxy group is optimal for hCES2A inhibitory potency;
哺乳动物羧酸酯酶(CES)是参与各种内源性和外源性底物水解代谢的关键酶。人羧酸酯酶2A(hCES2A)主要分布在小肠和结肠中,在许多药物的水解中起重要作用。在这项研究中,3-芳基异喹诺酮3 h [3-(4-(苄氧基)-3-甲氧基苯基)-7,8-二甲氧基异喹啉-1(2 H )-one]和4 a [3-(4-(苄氧基) ‐3-甲氧基苯基)-4-溴-7,8-二甲氧基异喹啉-1(2 H )-one]被发现对 hCES2A 具有强效抑制作用 (IC 50 =0.68 μM, K i =0.36 μM) 和优异的特异性 (超过 hCES1 A 的 147.05 倍)。而且,图 4a显示出相对于3小时,对活HepG2细胞中的细胞内hCES2A的抑制提高了三倍,IC 50值为0.41μM。抑制动力学研究和分子对接模拟的结果表明,3 h和4 a都可以与 hCES2A 上的多个位点结合,起到混合抑制剂的作
Synthesis of 6-substituted 5-cyano-7-hydroxy-2-carboxybenzofurans
作者:Simon J. Teague、Simon Barber
DOI:10.1016/j.tetlet.2010.07.020
日期:2010.9
Methods for the synthesis of 5-cyano-7-hydroxy-2-carboxybenzofurans bearing a variety of substituents at the 6-position are outlined. The scope and limitations of lithiation processes, electrophilic substitutions, and pericyclic reactions are investigated. (C) 2010 Elsevier Ltd. All rights reserved.
Cu(OAc)<sub>2</sub> catalysed aerobic oxidation of aldehydes to nitriles under ligand-free conditions
作者:Asit Kumar Das、Sneha Nandy、Sanjay Bhar
DOI:10.1039/d1ra07701e
日期:——
commercially available non-toxic copper acetate as an inexpensive catalyst and ammonium acetate as the source of nitrogen in the presence of aerial oxygen as an eco-friendly oxidant under ligand-free conditions. The reactions were associated with high yield and various sensitive moieties like allyloxy, benzyloxy, t-butyldimethylsilyloxy, hetero-aryl, formyl, keto, chloro, bromo, methylenedioxy and