1484-26-0Relevant articles and documents
Substituted diarylurea derivative as well as preparation method and application thereof
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Paragraph 0157-0158; 0160, (2021/08/19)
The invention relates to a substituted diarylurea derivative as well as preparation and application thereof. Specifically, the invention discloses a compound with a formula (I) or an optical isomer, a cis-trans-isomer or a pharmaceutically acceptable salt thereof, and a preparation method thereof, wherein the definition of each substituent group in the general formula is described in the specification and claims. The invention further discloses a composition containing the compound and application of the composition. The compound disclosed by the invention has excellent anti-cancer activity on HepG2 liver cancer cells, MGC 803 gastric cancer cells, MCF 7 breast cancer cells and the like, and has a good inhibition effect on the growth of human umbilical vein endothelial cells (HUVEC).
Microballs Containing Ni(0)Pd(0) Nanoparticles for Highly Selective Micellar Catalysis in Water
Bihani, Manisha,Bora, Pranjal P.,Nachtegaal, Maarten,Jasinski, Jacek B.,Plummer, Scott,Gallou, Fabrice,Handa, Sachin
, p. 7520 - 7526 (2019/08/15)
Both Ni(0) complexes and nanoparticles (NPs) are unstable in water, which poses a significant hindrance to their application in aqueous synthetic catalysis. To overcome these barriers, ligated Ni(0) nanoparticles (diameter 1 nm) containing a minimum amount of Pd(0) in the microballs formed of amphiphile PS-750-M are developed and applied in the highly selective carbamate cleavage. Selectivity and functional group tolerance are thoroughly investigated. Control experiments revealed the importance of an individual component of the nanocatalyst. Use of our proline-based amphiphile PS-750-M is critical for achieving microball architecture, the stability of nanoparticles, and desired catalytic activity. Once formed, microballs can be isolated and stored at ambient temperature. Catalyst is thoroughly characterized by X-ray photoelectron spectroscopy, scanning electron microscopy, high-resolution transmission electron microscopy, thermogravimetric analysis, infrared, and cyclic voltammetry. For selective catalysis, zero oxidation state of both Ni and Pd is crucial. On the basis of catalyst characterization and control experiments, the plausible reaction mechanism is proposed.
Enantioselective Visible-Light-Mediated Formation of 3-Cyclopropylquinolones by Triplet-Sensitized Deracemization
Tr?ster, Andreas,Bauer, Andreas,Jandl, Christian,Bach, Thorsten
supporting information, p. 3538 - 3541 (2019/02/01)
3-Allyl-substituted quinolones undergo a triplet-sensitized di-π-methane rearrangement reaction to the corresponding 3-cyclopropylquinolones upon irradiation with visible light (λ=420 nm). A chiral hydrogen-bonding sensitizer (10 mol %) was shown to promote the reaction enantioselectively (88–96 % yield, 32–55 % ee). Surprisingly, it was found that the enantiodifferentiation does not occur at the state of initial product formation but that it is the result of a deracemization event. The individual parameters that control the distribution of enantiomers in the photostationary state have been identified.