摘要:
A method for preparing methyl isobutyl ketone comprises reacting mesityl oxide and methyl isobutyl alcohol under the action of a copper-based catalyst to produce methyl isobutyl ketone, where mesityl oxide and methyl isobutyl alcohol are employed to carry out hydrogen in-situ transfer under the action of the copper-based catalyst, and methyl isobutyl ketone is prepared in one step. The entire reaction process does not require an external hydrogen system. The reaction is carried out under normal pressure, and the process flow is short. The reaction has high atom utilization, high safety, and is suitable for popularization and industrial application.
摘要:
The present invention relates to novel compounds which are particularly useful for the synthesis of novel chromanol derivatives. These compounds have interesting properties. Particularly, the novel chromanol derivatives have interesting antioxidant properties as well as flavours and fragrances.
摘要:
Disclosed herein are reaction compositions comprising an oxidation catalyst, a solvent, and a substrate that is dissolved in the solvent. The oxidation catalyst comprises a metal ion complexed with an α-keto acid and a tridentate N,N,O-ligand. Also disclosed herein are methods for oxidizing a C—H bond of a molecule, the methods comprising contacting the molecule with a metal complex comprising a metal ion complexed with a tridentate N,N,O-ligand in the presence of an α-keto acid and a solvent. In some embodiments, the oxidation catalyst or metal complex is linked to a solid support.
摘要:
A long life catalyst is provided that is conveniently and inexpensively capable of being produced and that is highly active and has inhibited metal leakage. According to aspects of the present invention, a catalyst is provided that includes: a polymer including a plurality of first structural units and a plurality of second structural units; and metal acting as a catalytic center, wherein at least part of the metal is covered with the polymer, each of the plurality of first structural units has a first atom constituting a main chain of the polymer and a first substituent group bonded to the first atom, a second atom included in each of the plurality of second structural units is bonded to the first atom, and the second atom is different from the first atom, or at least one of all substituent groups on the second atom is different from the first substituent group.
摘要:
This invention relates to molecular catalysts and chemical reactions utilizing the same, and particularly to molecular catalysts for efficient catalytic oxidation of hydrocarbons, such as hydrocarbons from natural gas. The molecular catalytic platform provided herein is capable of the facile oxidation of hydrocarbons, for example, under ambient conditions such as near room temperature and atmospheric pressure.
摘要:
The present invention relates to the use of specific organic compounds as flavor and fragrance material. Furthermore the invention relates to a new specific organic compound, as well as to flavor and fragrance formulations comprising at least one of the specific organic compounds.
摘要:
The present invention relates in a first aspect to a process for hydrogenation of ketones having at least a carbon-carbon double bond in the y,8-position to the keto group by hydrogen in the presence of at least one chiral iridium complex of formula (I), where R1 represents a group of formula (II) or (III) or (IV). It has been shown that this process leads to a strong increase in preferential formation of a single isomer. The process is particularly suitable for the hydrogenation of y,8-unsaturated ketones which can be used as flavors and fragrances or for the preparation of vitamin E and its derivatives or of flavors and fragrances.
摘要:
This invention relates to molecular catalysts and chemical reactions utilizing the same, and particularly to molecular catalysts for efficient catalytic oxidation of hydrocarbons, such as hydrocarbons from natural gas. The molecular catalytic platform provided herein is capable of the facile oxidation of hydrocarbons, for example, under ambient conditions such as near room temperature and atmospheric pressure.
摘要:
The invention relates to conjugates of formula (V) or (VI): wherein X is —CO—NH—, —NH—, —O—, —NHCONH—, or —NHCSNH—; their use as radiopharmaceuticals, processes for their preparation, and synthetic intermediates used in such processes.
摘要:
Novel perfluoroketone compounds of formula [I] and [Ia] are described. Also described are uses thereof, such as for inhibition of phospholipase A2 activity. Therapeutic uses thereof are also described, such as for the treatment of neural conditions and/or inflammatory conditions, such as demyelinating (e.g., multiple sclerosis) and neural injury (e.g., spinal cord injury).