53874-66-1Relevant articles and documents
Some examples of phase-transfer catalysis application in organochlorine chemistry
Sirovski, Felix S.
, p. 437 - 441 (1999)
Kinetics of phase-transfer catalysed (PTC'd) dehydrochlorination of the α-isomer of hexachlorocyclohexane in the presence of proton donors was investigated. Carboxylic acids and picric acid act as inhibitors. Benzyl alcohol strongly promotes the reaction. The plots of observed rate constants vs phenol and pentachlorophenol concentration have a bell-shaped form that was not observed before. An example of long-chain quats application in the synthesis of the ketamine anaesthetic intermediate by dehydrochlorination in dilute alkali is shown. Another application of phase-transfer catalysis (PTC) in organochlorine chemistry is the aqueous (sodium hypochlorite) chlorination of alkyl aromatic compounds. The results of m-phenoxytoluene chlorination and reaction kinetics in the presence of the polymeric crown are described.
Preparation method of m-phenoxy benzaldehyde
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, (2021/04/28)
The invention provides a preparation method of m-phenoxy benzaldehyde, and belongs to the technical field of organic synthesis. The preparation method provided by the invention comprises the following steps: condensing m-cresol serving as a raw material with halogenated benzene to obtain m-phenoxytoluene, reacting the m-phenoxytoluene with chlorine to chloridize methyl to obtain a m-phenoxytoluene chloro product, oxidizing the m-phenoxytoluene chloro product through Komblum to obtain an oxide of the m-phenoxytoluene chloro product, and directly hydrolyzing the m-phenoxytoluene chloro product without separation to obtain the product m-phenoxy benzaldehyde. The preparation method provided by the invention has the advantages that the raw materials are cheap and easily available, the yield is high, the product quality meets the market demand, the problems of high raw material price, many side reactions, many impurities, low yield, large wastewater amount and serious environmental pollution in the traditional process are solved, and the production cost of m-phenoxybenzaldehyde is greatly reduced. Data of the embodiment shows that the total yield of m-phenoxybenzaldehyde obtained by the preparation method provided by the invention is 83.5%, and the gas phase content is 99.3%.
Improving metabolic stability with deuterium: The discovery of HWL-066, a potent and long-acting free fatty acid receptor 1 agonists
Liu, Chunxia,Li, Zheng,Shi, Wei,Li, Huilan,Wang, Nasi,Dai, Yuxuan,Liao, Chen,Huang, Wenlong,Qian, Hai
, p. 1547 - 1554 (2018/07/31)
The free fatty acid receptor 1 (FFA1) is a potential target due to its function in enhancing of glucose-stimulated insulin secretion. The FFA1 agonist GW9508 has great potential for the treatment of type 2 diabetes mellitus, but it has been suffering from high plasma clearance probably because the phenylpropanoic acid is vulnerable to β-oxidation. To identify orally available analog without influence on the unique pharmacological mechanism of GW9508, we tried to interdict the metabolically labile group by incorporating two deuterium atoms at the α-position of phenylpropionic acid affording compound 4 (HWL-066). As expected, HWL-066 revealed a lower clearance (CL?=?0.23?L?1?hr?1?kg?1), higher maximum concentration (Cmax?=?5907.47?μg/L), and longer half-life (T1/2?=?3.50?hr), resulting in a 2.8-fold higher exposure than GW9508. Moreover, the glucose-lowering effect of HWL-066 was far better than that of GW9508 and comparable with TAK-875. Different from glibenclamide, no side-effect of hypoglycemia was observed in mice after oral administrating HWL-066 (80?mg/kg).
