611-20-1Relevant articles and documents
Tuning molecular recognition in water-soluble nanogels with enzyme-like activity for the Kemp elimination
Servant, Ania,Haupt, Karsten,Resmini, Marina
, p. 11052 - 11059 (2011)
The synthesis and characterization of water-soluble imprinted nanogels with enzyme-like activity in the Kemp elimination is reported together with studies that demonstrate how the recognition properties, morphology, and catalytic activity of the nanoparti
Photochemistry of salicylaldoxime in solid argon: An experimental and theoretical study
Grzegorzek, Joanna,Mielke, Zofia
, p. 5301 - 5309 (2010)
The photochemistry of salicylaldoxime in solid argon has been investigated by FTIR spectroscopy and DFT calculations. The salicylaldoxime molecule trapped in the matrix from the vapor above the solid sample has the most stable syn1 conformation with an in
Zr mesoporous molecular sieves as novel solid acid catalysts in synthesizing nitrile and caprolactam
Nedumaran,Pandurangan
, p. 2799 - 2809 (2014)
Zr mesoporous materials with different Si/Zr ratio were synthesized by the surfactant-templated method involving cetyl trimethyl ammonium bromide (CTAB) as template and tetraethyl ortho silicate (TEOS) as organic source of silicon. The synthesized materia
Method for hydrolyzing diarylether compound to generate aryl phenol compound
-
Paragraph 0139-0141, (2021/09/29)
The invention discloses a method for hydrolyzing a diarylether compound to generate an arylphenol compound. According to the method, visible light is utilized to excite a photosensitizer for catalysis. In a reaction solvent, the raw material in the formula (1) breaks a C (sp2)-O bond under the auxiliary action of acid, and hydrolysis is performed to obtain the bimolecular aryl phenol compounds in the formula (3) and the formula (4). The method can catalyze the reaction at room temperature, is green and environment-friendly, and is easy to operate; the universality is wide, the reaction yield is relatively high, and the tolerance of functional groups is strong; the synthesis method not only can realize small-scale hydrolysis conversion of various diarylether compounds, but also can realize hydrolysis of herbicidal ether, triclosan and a lignin template substrate, and even can realize large-scale hydrolysis of triclosan and the lignin template substrate to realize gram-level degradation. A new strategy is provided for recovering phenol derivatives through lignin hydrolysis, degrading pesticides and purifying wastewater containing a degerming agent or herbicide. The method has wide application prospect and use value.
Copper-mediated Regioselective CH Cyanation of Phenols with Assistance of Bipyridine-type Bidentate Auxiliary
Hirano, Koji,Kajiwara, Rikuo,Miura, Masahiro
supporting information, p. 1814 - 1817 (2021/10/27)
A Cu-mediated ortho-selective CH cyanation of phenols with ethyl cyanoformate as the cyano source has been developed. The key to success is the introduction of 4,4¤-di-tert-butyl-2,2¤-bipyridine (dtbpy) bidentate auxiliary on the phenol oxygen, which is easily attachable, detachable, and recyclable. The newly developed protocol is tolerant of several carbonyl functional groups, which are incompatible with previous Lewis-acid-promoted cyanation of phenols.
Photocatalytic synthesis of phenols mediated by visible light using KI as catalyst
Huiqin, Wei,Wu, Mei
supporting information, (2021/11/30)
A transition-metal-free hydroxylation of iodoarenes to afford substituted phenols is described. The reaction is promoted by KI under white LED light irradiation and uses atmospheric oxygen as oxidant. By the use of triethylamine as base and solvent, the corresponding phenols are obtained in moderate to good yields. Mechanistic studies suggest that KI and catalysis synergistically promote the cleavage of C-I bond to form free aryl radicals.
Building a Pyrazole–Benzothiadiazole–Pyrazole Photosensitizer into Metal–Organic Frameworks for Photocatalytic Aerobic Oxidation
Jin, Ji-Kang,Wu, Kun,Liu, Xin-Yi,Huang, Guo-Quan,Huang, Yong-Liang,Luo, Dong,Xie, Mo,Zhao, Yifang,Lu, Weigang,Zhou, Xiao-Ping,He, Jian,Li, Dan
supporting information, p. 21340 - 21349 (2021/12/17)
Charge separation plays a crucial role in regulating photochemical properties and therefore warrants consideration in designing photocatalysts. Metal–organic frameworks (MOFs) are emerging as promising candidates for heterogeneous photocatalysis due to their structural designability and tunability of photon absorption. Herein, we report the design of a pyrazole–benzothiadiazole–pyrazole organic molecule bearing a donor–acceptor–donor conjugated π-system for fast charge separation. Further attempts to integrate such a photosensitizer into MOFs afford a more effective heterogeneous photocatalyst (JNU-204). Under visible-light irradiation, three aerobic oxidation reactions involving different oxygenation pathways were achieved on JNU-204. Recycling experiments were conducted to demonstrate the stability and reusability of JNU-204 as a robust heterogeneous photocatalyst. Furthermore, we illustrate its applications in the facile synthesis of pyrrolo[2,1-a]isoquinoline-containing heterocycles, core skeletons of a family of marine natural products. JNU-204 is an exemplary MOF platform with good photon absorption, suitable band gap, fast charge separation, and extraordinary chemical stability for proceeding with aerobic oxidation reactions under visible-light irradiation.
Transforming a Fluorochrome to an Efficient Photocatalyst for Oxidative Hydroxylation: A Supramolecular Dimerization Strategy Based on Host-Enhanced Charge Transfer
Tang, Bohan,Xu, Weiquan,Xu, Jiang-Fei,Zhang, Xi
supporting information, p. 9384 - 9388 (2021/03/22)
The development of non-covalent synthetic strategy to fabricate efficient photocatalysts is of great importance in theranostic and organic materials. Herein, a fluorochrome N,N′-dimethyl 2,5-bis(4-pyridinium)thiazolo[5,4-d]thiazolediiodide (MPT) was transformed into an efficient photocatalyst through supramolecular dimerization in the cavity of cucurbit[8]uril (CB[8]). The host-enhanced charge transfer interaction within the supramolecular dimer 2MPT-CB[8] dramatically promoted intersystem crossing to produce triplet. In addition, the staggered conformation of 2MPT-CB[8] facilitated the energy transfer and electron transfer of the triplet. As a result, 2MPT-CB[8] could serve as a high-efficiency photocatalyst for the oxidative hydroxylation of arylboronic acids. This supramolecular dimerization strategy enriches the supramolecular engineering of functional π-systems. It is anticipated that this strategy can be extended to fabricate various π-systems with tailor-made functions.
Preparation method of 2-hydroxy-benzonitrile
-
Paragraph 0034-0047, (2021/05/05)
The invention relates to the field of preparation of medicine and pesticide intermediates, and discloses a novel preparation method of 2-hydroxy-benzonitrile, which comprises the step of carrying out contact reaction on 2-methoxybenzonitrile and lithium h
Synthetic method for co-production of 2-hydroxy-benzonitrile and plant growth regulator
-
Paragraph 0046; 0073-0087, (2021/06/26)
The invention relates to the field of pesticides, and discloses a synthetic method for co-production of 2-hydroxy-benzonitrile and a plant growth regulator. The method comprises the steps of 1) in the presence of an aprotic polar solvent, enabling 2-methoxybenzonitrile and lithium chloride to be subjected to a contact reaction to obtain 2-hydroxy-benzonitrile and chloromethane gas; and (2) carrying out quaternization reaction on the chloromethane gas obtained in the step (1) and a solution containing N-methylpiperidine or a solution containing N-methylmorpholine to obtain mepiquat chloride or mepiquat chloride. The method is green and environment-friendly, mild in reaction condition and simple and convenient to operate, the 2-hydroxy-benzonitrile can be obtained at high yield, and the mepiquat chloride or the sulfonamide is co-produced at the same time, so that zero emission of tail gas is achieved.
