Horseradish peroxidase (HRP): a tool for catalyzing the formation of novel bicoumarins
作者:Xiaoxv Gao、Shanshan Huang、Peipei Dong、Chao Wang、Jie Hou、Xiaokui Huo、Baojing Zhang、Tonghui Ma、Xiaochi Ma
DOI:10.1039/c5cy01682g
日期:——
peroxidase (HRP) was used to effectively catalyze the dimerization of coumarins. On the basis of screening and preparative transformation, the catalytic ability of HRP to dimerize various coumarins was investigated. Coumarins that only had one substituted phenolic hydroxyl group could be selectively transformed into novel bicoumarins, while coumarins that had two or more hydroxyls could be transformed
辣根过氧化物酶(HRP)用于有效催化香豆素的二聚化。在筛选和制备转化的基础上,研究了HRP对各种香豆素二聚的催化能力。仅具有一个取代酚羟基的香豆素可以选择性地转化为新型双香豆素,而具有两个或多个羟基的香豆素可以转化为多个双香豆素。获得了八种双香豆素,并通过光谱分析鉴定。其中,首次报道了双香豆素1b,2a,2b,3a和3b。还通过计算机研究了不同类型的香豆素与HRP之间的相互作用对接分析。使用转化产物作为标准物质,进行了催化反应的动力学分析。HRP催化香豆素二聚的最佳反应条件为1 g L -1 HRP,0.66 MH 2 O 2,pH 3、25°C和15分钟的孵育时间。双香豆素的产率为10%至40%,特别是双香豆素1a的产率为约35%。在体外生物测定中,几种新颖的双香豆素显示出潜在的α-葡萄糖苷酶抑制活性,可进一步用于开发抗糖尿病药。
α-Glucosidase Inhibitors via Green Pathway: Biotransformation for Bicoumarins Catalyzed by <i>Momordica charantia </i>Peroxidase
作者:Xiao-Jun Hu、Xiao-Bing Wang、Ling-Yi Kong
DOI:10.1021/jf304384b
日期:2013.2.20
charantia catalyzed the H2O2-dependent oxidative coupling of 7-hydroxy-4-methylcoumarin to form four new dimers (1–4) and two known ones (5, 6). The structures, including the absolute configurations of axiallychiral compounds, were unambiguously characterized by NMR spectroscopy, online HPLC-CD, and a variety of computational methods. Bioactive experiments demonstrated that compounds 1 and 2 had significant