已经开发了将可生物更新的阿魏酸有效转化为生物邻苯二酚的方法。该转化包括在一个步骤中发生的两个连续的底物去官能化,即CO(去甲基化)和CC(去2-羧基乙烯基化)键裂解。该过程仅需要在加压热水(250°C,50 bar N2)中将阿魏酸与HCl(或H2 SO4)作为催化剂加热。在多种其他(生物可再生)底物上也显示出多功能性,可产生高达84%的二-(邻苯二酚,间苯二酚,对苯二酚)和三羟基苯(邻苯三酚,羟基喹啉),在大多数情况下,仅需简单提取即可进行后处理。
已经开发了将可生物更新的阿魏酸有效转化为生物邻苯二酚的方法。该转化包括在一个步骤中发生的两个连续的底物去官能化,即CO(去甲基化)和CC(去2-羧基乙烯基化)键裂解。该过程仅需要在加压热水(250°C,50 bar N2)中将阿魏酸与HCl(或H2 SO4)作为催化剂加热。在多种其他(生物可再生)底物上也显示出多功能性,可产生高达84%的二-(邻苯二酚,间苯二酚,对苯二酚)和三羟基苯(邻苯三酚,羟基喹啉),在大多数情况下,仅需简单提取即可进行后处理。
A Simple and Efficient Procedure of Low Valent Iron- or Copper-Mediated Reformatsky Reaction of Aldehydes
作者:Angshuman Chattopadhyay、Akhil Kr. Dubey
DOI:10.1021/jo0710984
日期:2007.11.1
An operationally simple and very efficient procedure of Reformatsky reaction of aldehydes has been carried out in THF in the presence of low valent iron or copper which were prepared in situ employing a bimetal redox strategy through reduction of FeCl3 or CuCl2−2H2O with magnesium.
Lignans and related phenols. Part VI. Synthesis of 2-aryltertrahydrooxofuran derivatives
作者:D. C. Ayres、S. E. Mhasalkar
DOI:10.1039/j39680001885
日期:——
The Michael addition of glycollate to an alkoxycinnamic ester is demonstrated and the mode of the subsequent Dieckmann cyclisation [to yield (II)] is proved.
Optically active alkyl 3-aryl-3-hydroxypropionates and a method for producing thereof
申请人:CHISSO CORPORATION
公开号:EP0451668A2
公开(公告)日:1991-10-16
The invention relates to optically active alkyl 3-aryl-3-hydroxypropionates represented by the general formula:
wherein R¹, R², R³, R ⁴ and R⁵ are hydrogen, hydroxyl, alkoxy of 1-4 carbon atoms, benzyloxy, flurorine, chlorine or bromine and R⁶ is alkyl,
and a method for producing the above compounds.
Helicobacter pylori urease is involved in several physiologic responses such as stomach and duodenal ulcers, adenocarcinomas and stomach lymphomas. Thus, inhibition of urease is taken for a good chance to treat H. pylori-caused infections, we have therefore focused our efforts on seeking novel urease inhibitors. Here, a series of arylpropionylhydroxamic acids were synthesized and evaluated for urease inhibition. Out of these compounds, 3-(2-benzyloxy-5-chlorophenyl)-3-hydroxypropionylhydroxamic acid (d24) was the most active inhibitor with IC50 of 0.15 +/- 0.05 mu M, showing a mixed inhibition with both competitive and uncompetitive aspects. Non-linear fitting of kinetic data gives kinetics parameters of 0.13 and 0.12 mu g.mL(-1) for K-i and K-i', respectively. The plasma protein binding assays suggested that d24 exhibited moderate binding to human and rabbit plasma proteins. (C) 2016 Elsevier Ltd. All rights reserved.
Microbial synthesis of (+)-(3R)-ethyl 3-hydroxy-3-(3,4-dimethoxyphenyl)propionate
From the microbiological reduction of ethyl 3-oxo-3-(3,4-dimethoxyphenyl)propionate, (+)-(3R)-ethyl 3-hydroxy-3-(3,4-dimethoxyphenyl)propionate was prepared on a quantitative scale. The absolute configuration was assigned by X-ray structural determination of the crystallized camphanate derivative. Copyright (C) 1996 Elsevier Science Ltd