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637009-12-2

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637009-12-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 637009-12-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,7,0,0 and 9 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 637009-12:
(8*6)+(7*3)+(6*7)+(5*0)+(4*0)+(3*9)+(2*1)+(1*2)=142
142 % 10 = 2
So 637009-12-2 is a valid CAS Registry Number.

637009-12-2Relevant articles and documents

Syntheses of showdomycin and its anomer using N-(triisopropylsilyl)pyrrole as a synthetic equivalent for the maleimide C3-anion

Hungerford, Natasha L.,Armitt, David J.,Banwell, Martin G.

, p. 1837 - 1843 (2003)

Showdomycin (1) and its anomer (2) have been prepared in four steps from readily available trichloroacetimidate 9. The key step involves reaction of the last compound with the title pyrrole 3 so as to form a chromatographically separable mixture of the pyrrole C-glycosides 10 and 11. These pyrroles are desilylated then oxidized to the corresponding maleimides using PCC.

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