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2187-27-1

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2187-27-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2187-27-1 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,1,8 and 7 respectively; the second part has 2 digits, 2 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 2187-27:
(6*2)+(5*1)+(4*8)+(3*7)+(2*2)+(1*7)=81
81 % 10 = 1
So 2187-27-1 is a valid CAS Registry Number.

2187-27-1Relevant articles and documents

Convergent integration of three self-sorting domino sequences: Three-component direct synthesis of 3-methylthio-4-aryl-maleimides from methyl ketones with acetonitrile and DMSO

Gao, Qinghe,Liu, Shan,Wu, Xia,Wu, Anxin

supporting information, p. 6403 - 6406 (2014/12/10)

An I2-promoted three-component coupling reaction was described for the construction of 3-(methylthio)-4-aryl-1H-pyrrole-2,5-diones from methyl ketones with acetonitrile and DMSO. This transformation involved the in situ generation and application of α-ketoimides. Furthermore, DMSO was converted to DMS in situ, which subsequently served as a methylthiolation reagent in the reaction. To the best of our knowledge, this protocol provided the first known example of convergent integration of three self-sorting domino sequences.

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