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56440-94-9

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56440-94-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 56440-94-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,6,4,4 and 0 respectively; the second part has 2 digits, 9 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 56440-94:
(7*5)+(6*6)+(5*4)+(4*4)+(3*0)+(2*9)+(1*4)=129
129 % 10 = 9
So 56440-94-9 is a valid CAS Registry Number.

56440-94-9Relevant articles and documents

Synthesis of chiral isoindolinones via asymmetric propargylation/lactamization cascade

Meng, Jiao-Long,Jiao, Tang-Qian,Chen, Ya-Heng,Fu, Rui,Zhang, Shu-Sheng,Zhao, Qian,Feng, Chen-Guo,Lin, Guo-Qiang

, p. 1564 - 1567 (2018)

A Zn-mediated propargylation/lactamization cascade reaction with chiral 2-formylbenzoate derived N-tert-butanesulfinyl imines was realized, which provided a practical and efficient method for the synthesis of chiral isoindolinones. High diastereoselectivities (up to 97:3 dr) and good reaction yields were observed for most examined cases.

Synthesis of 1,3-Dihydroxy-5,6,7-trimethoxy-2-methyl-anthraquinone

Duggal, J. Kaur,Misra, K.

, p. 1000 - 1001 (2007/10/02)

A new anthraquinone, viz. 1,3-dihydroxy-5,6,7-trimethoxy-2-methylanthraquinone has been synthesised by the cyclisation of 1',3'-dihydroxy-3,4,5-trimethoxy-2'-methylbenzophenone-2-carboxylic acid with sulphuric acid in presence of boric acid, and has been found to be identical with the natural sample earlier isolated from Cassia javanica roots.

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