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504421-90-3

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504421-90-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 504421-90-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,4,4,2 and 1 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 504421-90:
(8*5)+(7*0)+(6*4)+(5*4)+(4*2)+(3*1)+(2*9)+(1*0)=113
113 % 10 = 3
So 504421-90-3 is a valid CAS Registry Number.

504421-90-3Relevant articles and documents

Total synthesis of indole-3-acetonitrile-4-methoxy-2-C-β-d- glucopyranoside. Proposal for structural revision of the natural product

Yepremyan, Akop,Minehan, Thomas G.

supporting information; experimental part, p. 5194 - 5196 (2012/08/08)

Indole-3-acetonitrile-4-methoxy-2-C-β-d-glucopyranoside (1), a novel C-glycoside from Isatis indigotica with important cytotoxic activity, has been prepared in ten steps from ethynyl-β-C-glycoside 3 and 2-iodo-3-nitrophenyl acetate 6. Key steps in the synthesis include a Sonogashira coupling and a CuI-mediated indole formation. NMR spectroscopic data for synthetic 1 differs from that reported for the natural product. A revised structure for the natural product, containing an alternate carbohydrate substituent, is proposed. The Royal Society of Chemistry 2012.

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