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202390-90-7

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202390-90-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 202390-90-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,2,3,9 and 0 respectively; the second part has 2 digits, 9 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 202390-90:
(8*2)+(7*0)+(6*2)+(5*3)+(4*9)+(3*0)+(2*9)+(1*0)=97
97 % 10 = 7
So 202390-90-7 is a valid CAS Registry Number.

202390-90-7Relevant articles and documents

Synthesis of a phenolic analog of aphidicolin. Diminished stereoselection in intramolecular 6-exo Heck reactions of substrates having a hydrocarbon tether

Abelman, Matthew M.,Kado, Noriyuki,Overman, Larry E.,Sarkar, Achintya K.

, p. 1469 - 1471 (2007/10/03)

Spirotetracycle 14, generated by intramolecular Heck cyclization of 13, was converted to the phenolic analog 20 of aphidicolin. That the nature of the tether connecting insertion partners can dramatically alter diastereoselection in intramolecular Heck reactions is also demonstrated.

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