free-radical coupling reactions. Many pretreatment methods have been developed to address recalcitrance, with ammonia pretreatments in general, and the AFEX (Ammonia Fiber Expansion) process in particular, among the more promising methods. In order to understand the polysaccharide liberating reactions involved in the cleavage of diferulate cell wall cross-links during AFEX pretreatment, reaction products from
Rapid Syntheses of Dehydrodiferulates via Biomimetic Radical Coupling Reactions of Ethyl Ferulate
作者:Fachuang Lu、Liping Wei、Ali Azarpira、John Ralph
DOI:10.1021/jf302140k
日期:2012.8.29
ferulate via biomimetic radical coupling reactions using the copper(II)–tetramethylethylenediamine [CuCl(OH)–TMEDA] complex as oxidant or catalyst. Although CuCl(OH)–TMEDA oxidation of ethyl ferulate in acetonitrile produced mixtures composed of 8–O–4-, 8–5-, 8–8- (cyclic and noncyclic), and 5–5-coupled diferulates, a catalyzed oxidation using CuCl(OH)–TMEDA as catalyst and oxygen as an oxidant resulted
草细胞壁中阿魏酸盐的脱氢二聚化提供了一条通往多糖链交联的途径,从而限制了反刍动物对碳水化合物的消化能力,并总体上影响了草作为可再生生物资源的利用。分析植物细胞壁中的脱氢二氢蝶呤(以下简称二齿)对于评估作为动物饲料的乳制品的质量非常有用。因此,对于这样的分析的标准,有大量的散剂需求。这里描述的是通过使用仿铜自由基(II)-四甲基乙二胺[CuCl(OH)-TMEDA]络合物作为氧化剂或催化剂,通过仿生自由基偶联反应,从阿魏酸乙酯合成二氟甲酸酯。尽管CuCl(OH)–TMEDA在乙腈中氧化阿魏酸乙酯会生成由8– O组成的混合物–4、8–5、8–8-(环状和非环状)和5–5耦合的碳酸氢盐,使用CuCl(OH)–TMEDA作为催化剂,使用氧气作为氧化剂进行催化氧化,可得到更好的总收率。这样扩散。快速色谱分离可以分离出8–8-和5–5耦合的碎片。8–5–有硅藻土与8 – O –4–有硅藻土共洗脱,但通
ANTIMICROBIAL FERULIC ACID DERIVATIVES AND USES THEREOF
申请人:WISCONSIN ALUMNI RESEARCH FOUNDATION
公开号:US20150313221A1
公开(公告)日:2015-11-05
Antimicrobial diferulates, compositions containing same, and uses of same for inhibiting growth of microorganisms. The antimicrobial diferulates can be used alone or in combination with other antimicrobial agents to inhibit growth of microorganisms such as fungi, oomycetes, and other microorganisms having a glucan-containing cell wall. The antimicrobial diferulates can be included in pharmaceutical compositions for treatment of animals or included in agricultural compositions for treatment of plants, crops, and soils.