- Enabling iron catalyzed Doyle-Kirmse rearrangement reactions with: In situ generated diazo compounds
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Slow addition of sodium nitrite allows the in situ preparation of highly explosive diazo compounds and enables their safe and scalable application in iron catalyzed rearrangement reactions of allylic and propargylic sulfides. With catalyst loadings as low as 0.1 mol% an effective entry into α-mercapto-nitriles, α-mercapto-esters and α-trifluoromethyl-sulfides on a gram-scale is achieved.
- Hock, Katharina J.,Mertens, Lucas,Hommelsheim, Renè,Spitzner, Robin,Koenigs, Rene M.
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- Method for synthesizing aminoacetonitrile hydrochloride from hydrocyanic acid
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The invention relates to the technical field of organic chemical synthesis. The method comprises the following steps: reacting hydrocyanic acid with formaldehyde to obtain a hydroxyacetonitrile aqueous solution, reacting hydroxyacetonitrile with ammonia to obtain an aminoacetonitrile aqueous solution, reacting aminoacetonitrile with hydrogen chloride, and concentrating, crystallizing, filtering and drying the obtained feed liquid to obtain aminoacetonitrile hydrochloride. The method provided by the invention is simple in technological process and mild in reaction condition, high-temperature and high-pressure operation is not involved, and used equipment is conventional equipment; except hydrocyanic acid, other raw materials are easy to obtain, and the raw material cost is low; waste waterand waste gas are small in amount and can be used indiscriminately, and only a small amount of ammonium chloride is generated; the product quality is good, and the appearance and content are higher than those of a sodium cyanide process.
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Page/Page column 0031; 0035; 0039; 0043; 0047; 0051; 0055; 0059
(2020/08/18)
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- Fluorobenzamides and uses thereof
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The invention relates to fluorobenzamide derivatives of the formula wherein R1, R2, R3 R4, R5, R6 and R7 are as defined herein. =, The compounds of the invention are selective monoamine oxidase B inhibitors and therefore they are suitable for the treatment of diseases mediated by monoamine oxidase B, such as Alzheimer's disease or senile dementia.
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