50392-78-4Relevant articles and documents
Pyridine methylamine compound and preparation method thereof
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Paragraph 0132-0138, (2021/08/28)
The invention provides a pyridine methylamine compound and a preparation method thereof. The preparation method comprises the steps that tetrahydrofuran and sodium borohydride are sequentially added into a cyanopyridine compound, then an iodine-containing tetrahydrofuran solution is dropwise added, a reaction is conducted at the temperature of 20-30 DEG C, and after dropwise adding is completed, stirring is carried out continuously; after the reaction is finished, methanol is added for refluxing, extracting and spin-drying are carried out to obtain the pyridine methylamine compound; wherein a functional group in the cyanopyridine compound is selected from chlorine, bromine, methyl, ethyl, amino or hydrogen; according to the preparation method, high-temperature and high-pressure special equipment does not need to be used, so that the preparation method is relatively safe, and dangerous accidents such as explosion and fire disasters are avoided; besides, the preparation method is relatively environment-friendly, recycling treatment of hazardous waste (used Raney nickel) is not involved, the economic benefit is relatively high, borane generated by the synthesis method is converted into boric acid esters in the post-treatment process, the treatment cost is low, and the harm to the environment is much small.
The Synthesis of Primary Amines through Reductive Amination Employing an Iron Catalyst
B?umler, Christoph,Bauer, Christof,Kempe, Rhett
, p. 3110 - 3114 (2020/06/01)
The reductive amination of ketones and aldehydes by ammonia is a highly attractive method for the synthesis of primary amines. The use of catalysts, especially reusable catalysts, based on earth-abundant metals is similarly appealing. Here, the iron-catalyzed synthesis of primary amines through reductive amination was realized. A broad scope and a very good tolerance of functional groups were observed. Ketones, including purely aliphatic ones, aryl–alkyl, dialkyl, and heterocyclic, as well as aldehydes could be converted smoothly into their corresponding primary amines. In addition, the amination of pharmaceuticals, bioactive compounds, and natural products was demonstrated. Many functional groups, such as hydroxy, methoxy, dioxol, sulfonyl, and boronate ester substituents, were tolerated. The catalyst is easy to handle, selective, and reusable and ammonia dissolved in water could be employed as the nitrogen source. The key is the use of a specific Fe complex for the catalyst synthesis and an N-doped SiC material as catalyst support.
OXAZOLONE AND PYRROLIDINONE-SUBSTITUTED ARYLAMIDES AS P2X3 AND P2X2/3 ANTAGONISTS
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Page/Page column 24, (2010/12/31)
Compounds of the formula 1: or a pharmaceutically acceptable salt thereof, wherein, X, Y, R1, R2, R3, R4, R5, R6 and R7 are as defined herein. Also disclosed are methods of using the compounds for treating diseases associated with P2X3 and/or a P2X2/3 receptor antagonists and methods of making the compounds.
