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79918-80-2

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79918-80-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 79918-80-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,9,9,1 and 8 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 79918-80:
(7*7)+(6*9)+(5*9)+(4*1)+(3*8)+(2*8)+(1*0)=192
192 % 10 = 2
So 79918-80-2 is a valid CAS Registry Number.

79918-80-2Relevant articles and documents

A practical, efficient, and atom economic alternative to the Wittig and Horner-Wadsworth-Emmons reactions for the synthesis of (E)-α,β- unsaturated esters from aldehydes

List, Benjamin,Doehring, Arno,Hechavarria Fonseca, Maria T.,Job, Andreas,Rios Torres, Ramon

, p. 476 - 482 (2006)

We describe a highly efficient new methodology for the synthesis of (E)-α,β-unsaturated esters from aldehydes. In our DMAP-catalyzed reaction, both aromatic as well as aliphatic aldehydes furnish the desired products highly regio- and stereoselectively if treated with commercially available or synthetically easily accessible malonic acid half ester. A large scale application in the synthesis of p-methoxycinnamates, which are of use as sunscreen ingredients, is described.

Method for preparing pregabalin by photocatalysis (by machine translation)

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Paragraph 0004, (2020/06/05)

The preparation method is characterized by comprising the 3S following -3 - steps:5 - 1) dissolving the compound I and a certain amount of alkali in an organic solvent, adding the compound II, heating the reaction, obtaining the compound III, 2) preparing the compound V; 3) preparing the compound V through deprotection, ring opening, chiral resolution, and recrystallization to obtain pregabalin. The preparation method comprises the following steps: 1) dissolving compound III, compound IV and photocatalyst in an organic solvent. The raw materials used in the invention are cheap and easily available, the reaction conditions of the photocatalytic oxidation method are mild, reagents are environmentally friendly, green and environment-friendly, and the method is an ideal industrial production process. (by machine translation)

Method for preparing 3-isobutylglutaric acid

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Page/Page column 6-9, (2019/10/04)

The invention discloses a method for preparing 3-isobutylglutaric acid. The method includes the following steps: carrying out a Knoevenagel condensation reaction on isovaleraldehyde and diethyl malonate with hexahydropyridine acetate as a catalyst in a cyclohexane solvent; carrying out a heating decarboxylation reaction on a product obtained by the first step in a solution composed of sodium chloride, DMSO and water; carrying out a Michael addition and decarboxylation reaction on a product obtained by the second step and diethyl malonate in an alcohol solvent of an alkali; and carrying out a hydrolysis reaction on a product obtained by the third step under an acidic condition to obtain the 3-isobutylglutaric acid product. The method of the invention uses the cheap and easily available isovaleraldehyde and diethyl malonate as raw materials, overcomes the defect of large steric hindrance of carbon-carbon a double bond in 5-methyl-2-cyano-2-hexenoate in the prior art, shortens the reaction time, and increases the reaction conversion rate of the isovaleraldehyde, thereby ensuring the overall yield of the 3-isobutylglutaric acid product.

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