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55540-33-5

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55540-33-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 55540-33-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,5,5,4 and 0 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 55540-33:
(7*5)+(6*5)+(5*5)+(4*4)+(3*0)+(2*3)+(1*3)=115
115 % 10 = 5
So 55540-33-5 is a valid CAS Registry Number.

55540-33-5Relevant articles and documents

Br?nsted Acid-Catalyzed Asymmetric Ring-Closing Alkylation of Inert N-substituted Pyrroles with α, β-Unsaturated Ketones

Wei, Zhao,Zhang, Jinlong,Yang, Huameng,Jiang, Gaoxi

supporting information, p. 3694 - 3697 (2019/07/12)

A Chiral Br?nsted acid catalyzed asymmetric intramolecular ring-closing alkylation of inert pyrroles with α, β-unsaturated ketones has been developed. This approach gave a wide range of 4-phenyl-4,5-dihydro-6H-benzo[f]pyrrolo[1,2-a]azepin-6-ones in high yields with good enantioselectivities under mild reaction conditions. (Figure presented.).

Tricyclic oxime ethers

-

, (2008/06/13)

The present invention relates to compounds of formula (I): STR1 wherein A, x, y, R1, R2 and R3 are as defined in the description. The compounds are useful for treating diseases requiring a selective serotonin reuptake site

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