在基于H 2 O 2的选择性氧化中研究了由8个连接的Zr 6簇和四位连接体组成的Zr-abtc和MIP-200金属有机骨架的催化性能,并将其与12配位的UiO-66和UiO进行了比较。 ‐67。Zr-abtc在α,β-不饱和酮中缺电子的C = C键的环氧化方面显示了底物转化和产物选择性方面的优势。1,2-环氧化物在香芹酮环氧化中的显着优势,再加上硫醚氧化中砜的高选择性,表明了Zr-abtc上的亲核氧化机理。Zr-abtc中不饱和酮的环氧化中优异的催化性能与大量弱碱性位点有关。H的亲电活化Zr-abtc在石竹烯中富电子的C = C键的环氧化中具有很高的活性,这也可以实现2 O 2。XRD和FTIR研究证实了催化后Zr-abtc结构的保留。MIP-200在基于H 2 O 2的氧化中的低活性很可能与它的特定亲水性有关,这不利于有机底物和H 2 O 2的吸附。
METHOD FOR MANUFACTURING AN EPOXY COMPOUND AND METHOD FOR EPOXIDIZING A CARBON-CARBON DOUBLE BOND
申请人:Takumi Kiyoshi
公开号:US20120108830A1
公开(公告)日:2012-05-03
The present invention provides a method for producing an epoxy compound, comprising oxidizing a carbon-carbon double bond of an organic compound by hydrogen peroxide in the presence of a neutral inorganic salt and a mixed catalyst of a tungsten compound (a), at least one phosphorus compound selected from the group consisting of phosphoric acids, phosphonic acids, and salts thereof (b) and a surfactant (c), and an epoxidizing method comprising oxidizing a carbon-carbon double bond by hydrogen peroxide in the presence of the catalyst and the neutral inorganic salt.
methylthiotransferases. Although the thiol–ene reaction for carbon–sulfur bond formation has found widespread applications in materials or medicinal science, a biocompatible chemo- and regioselectivehydrothiolation of unactivated alkenes and alkynes remains elusive. Here, we describe the design of a general chemoselective anti-Markovnikov hydroalkyl/aryl thiolation of alkenes and alkynes—also allowing
The present invention relates to a method for oxidizing beta-caryophyllene with oxygen, in particular atmospheric oxygen, which avoids the use of catalysts, enzymes and solvents. Furthermore, the present invention provides a mixture comprising certain caryophyllene oxides as well as their use as a flavor and/or fragrance. The present invention also relates to products and semi-finished products comprising the mixture according to the invention.
The present invention relates to extracts of cinnamon species plant material prepared by supercritical CO
2
extractions methods.
本发明涉及采用超临界CO2提取方法制备的肉桂属植物材料的提取物。
Croos-B Structure Binding Compounds
申请人:Gebbink Martijn Frans Ben Gerard
公开号:US20080267948A1
公开(公告)日:2008-10-30
The invention relates to the field of biochemistry, biophysical chemistry, molecular biology, structural biology and medicine. More in particular, the invention relates to cross-β structure conformation. Even more particular, the invention relates to compounds capable of binding to a compound with cross-β structure conformation, i.e. cross-β structure binding compounds and uses thereof.