Oxacycloalkenones are prepared by reacting a cycloalkenone with a base in the presence of a dioxygen source in a suitable solvent and isolating the desired product. 1-Hydroxy 2-oxa-3-oxo-.DELTA..sup.4 steroids are convenient synthetic precursors to 2-oxa-3-oxo-.DELTA..sup.4 steroids which find use in modern clinical therapy.
Chitosan-based Schiff base-metal complexes (Mn, Cu, Co) as heterogeneous, new catalysts for the β-isophorone oxidation
作者:C S THATTE、M V RATHNAM、A C PISE
DOI:10.1007/s12039-014-0601-4
日期:2014.5
A new chitosan-based Schiff base was prepared and complexed with manganese, cobalt and copper. These Schiff base metal complexes were used as heterogeneous catalysts for the air oxidation of β-isophorone to ketoisophorone. The obtained complexes were characterized by means of FT-IR,1HNMR spectroscopy, elemental analysis, powder X-ray diffraction, field emission gun scanning electron microscopy, electron spin resonance spectroscopy, ICP-AES and solubility tests. Thermal properties were also investigated using thermal gravimetric analysis. Data obtained by thermal analysis revealed that these complexes showed good thermal stability. The conversion and selectivity of β-isophorone to ketoisophorone for each prepared catalyst was studied using a batch reactor and gas chromatography for product identification and quantification. The results were compared against the homogeneous bis-salicylaldehyde ethylenedi-imine-Mn catalyst. The use of methanol, acetone, methyl isobutyl ketone and n-hexane as solvent and its effect on conversion and selectivity was also investigated. Acetone was found to be a promising solvent for the β-isophorone oxidation. The role of triethyl amine and acetyl acetone in the oxidation reaction has also been investigated.
[EN] ARTHROPOD CONTROLLING COMPOSITION<br/>[FR] COMPOSITION DE LUTTE CONTRE LES ARTHROPODES
申请人:FIRMENICH & CIE
公开号:WO2020239980A1
公开(公告)日:2020-12-03
The present invention relates to an arthropod controlling composition comprising a compound according to formula (I), methods and uses to control arthropods as well as arthropod controlling articles comprising the same.
[EN] SUBSTITUTED XANTHINES AND METHODS OF USE THEREOF<br/>[FR] XANTHINES SUBSTITUÉES ET LEURS MÉTHODES D'UTILISATION
申请人:HYDRA BIOSCIENCES INC
公开号:WO2014143799A2
公开(公告)日:2014-09-18
Compounds, compositions and methods are described for inhibiting the TRPC5 ion channel and disorders related to TRPC5.
描述了抑制TRPC5离子通道及与TRPC5相关的疾病的化合物、组合物和方法。
METHODS FOR IDENTIFYING ARTHROPOD REPELLENTS, AND COMPOUNDS AND COMPOSITIONS IDENTIFIED BY SUCH METHODS
申请人:The Regents of the University of California
公开号:EP3409115A2
公开(公告)日:2018-12-05
Provided herein are screening methods for identifying compounds for use as an arthropod repellent based on the masking or inhibition of the detection of the skin odor by a cpA neuron. Provided herein are also screening methods for identifying compounds for use as an arthropod attractant based on activation of the cpA neuron. Further provided are one or more compounds identified using the screening methods described herein, and compositions containing such compounds.