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618-92-8

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618-92-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 618-92-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,1 and 8 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 618-92:
(5*6)+(4*1)+(3*8)+(2*9)+(1*2)=78
78 % 10 = 8
So 618-92-8 is a valid CAS Registry Number.

618-92-8Relevant articles and documents

Preparation method of capsaicin and capsaicin prepared by using method

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, (2021/06/26)

The invention relates to a capsaicin preparation method and capsaicin prepared by the method. The preparation method comprises the steps that: in the presence of an organic solvent and a catalyst, vanillylamine and carboxylic acid serve as reactants, after amidation reaction, capsaicin reaction liquid is obtained, and the catalyst comprises a boric acid ester compound. Compared with the prior art, the capsaicin preparation method provided by the invention has the following beneficial effects: 1) a large amount of water is not generated in the reaction process, violent reflux for water separation is not needed, the production cost is reduced, and the production safety is improved; 2) boric acid is replaced by the boric acid ester compound, so that the reaction time can be shortened, the reaction yield can be improved, and the product purity is very high; and 3) the boric acid ester compound can be recycled after proper treatment after the reaction, so that the production cost is saved, and green production is realized.

Preparation method of capsaicine and capsaicine prepared by method

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, (2021/04/07)

The invention provides a preparation method of capsaicine and capsaicine prepared by the method. The preparation method comprises the following steps: in the presence of an organic solvent and a catalyst, by taking vanillylamine carboxylate and carboxylic acid as reactants, carrying out amidation reaction to obtain a capsaicine reaction liquid. Compared with the prior art, the capsaicine preparation method provided by the invention at least has one of the following beneficial effects: 1) vanillylamine is converted into vanillylamine carboxylate, so that the problem of oxidative discoloration of vanillylamine is avoided, and the problems of purification, drying and storage of intermediate products are solved; 2) the vanillylamine carboxylate can be directly used for the next amidation reaction, other substances are not introduced, and the amidation reaction, operation and post-treatment are not influenced; and 3) after the vanillylamine solid is salified and dissolved, the thorough separation of the Raney Ni catalyst is facilitated, and the catalyst separated by the method can be continuously used after being treated.

Method for preparing azelaic acid vanilla amide (by machine translation)

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Paragraph 0005; 0032-0051, (2020/11/22)

3 - Methoxyl 3 - hydroxybenzylamine and n-nonanoic acid are subjected to dehydration reaction under the catalytic action of aryl boronic acid, and the reaction time is -4 - and after stirring, the organic solvent is 3 - removed.4 - The method further comprises the following steps 1 of cooling to room temperature under the catalysis of aryl boronic acid; stirring after 1.2 adding water to obtain a pale yellow transparent -4 - liquid; and carrying out 10% dehydration reaction under a catalytic 25 °C - 85 °C action of aryl boronic 20min - 5h acid to obtain a white solid powder of anisononanoic acid. The method is simple in process, low in cost, high in yield, high in atom economy, low in reaction condition, high in product purity and environmentally friendly. (by machine translation)

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