Exploration of New Biomass‐Derived Solvents: Application to Carboxylation Reactions
作者:Ashot Gevorgyan、Kathrin H. Hopmann、Annette Bayer
DOI:10.1002/cssc.201903224
日期:2020.4.21
been evaluated as new sustainable solvents for a large variety of CO2 -based carboxylation reactions. Known biomass-derived solvents (biosolvents) are also included in the study and the results are compared with commonly used solvents for the reactions. Biosolvents can be efficiently applied in a variety of carboxylation reactions, such as Cu-catalyzed carboxylation of organoboranes and organoboronates
Zirconocene-catalyzed sequential ethylcarboxylation of alkenes using ethylmagnesium chloride and carbon dioxide
作者:Peng Shao、Sheng Wang、Chao Chen、Chanjuan Xi
DOI:10.1039/c5cc01153a
日期:——
The zirconocene-catalyzed sequential ethylcarboxylation of alkenes using ethylmagnesium chloride and carbon dioxide has been developed. A range of alkenes were transformed into the corresponding carboxylic acids in high yields.
A construct in which at least a part of the magnetic material is coated with a polyhydroxyalkanoate (PHA), and a method for producing a construct by immobilizing a PHA synthesizing enzyme on the surface of the magnetic material, thereby biosynthesizing and coating a PHA.
Structured construct and producing method therefor
申请人:Imamura Takeshi
公开号:US20070003975A1
公开(公告)日:2007-01-04
There is provided a construct in which at least a part of the magnetic material is coated with a polyhydroxyalkanoate (PHA), and a method for producing a construct by immobilizing a PHA synthesizing enzyme on the surface of the magnetic material, thereby biosynthesizing and coating a PHA.
carbon-containing cyclobutane-1,3-diones using chiral phosphoric acid catalysis and commercially available oxidants was reported. According to the structure of the substrates, two optimized reaction conditions were developed to afford the corresponding chiral tetronic acid products in ≤93% and ≤95% ee values. This reaction offers the first catalytic asymmetric approach to chiral 5,5-disubstituted tetronic acid derivatives
首次报道了使用手性磷酸催化和市售氧化剂对含季碳环丁烷-1,3-二酮进行高度对映选择性拜耳-维利格氧化。根据底物的结构,开发了两种优化的反应条件,得到了相应的手性季酮酸产物,其ee值≤93%和≤95%。该反应为手性 5,5-二取代特窗酸衍生物提供了第一个催化不对称方法。(−)-vertinolide 的正式不对称合成和 plakinidone B 的首次催化不对称全合成证明了该方法的合成潜力。