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644989-97-9

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644989-97-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 644989-97-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,4,4,9,8 and 9 respectively; the second part has 2 digits, 9 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 644989-97:
(8*6)+(7*4)+(6*4)+(5*9)+(4*8)+(3*9)+(2*9)+(1*7)=229
229 % 10 = 9
So 644989-97-9 is a valid CAS Registry Number.

644989-97-9Downstream Products

644989-97-9Relevant articles and documents

Novel Petasis boronic acid reactions with 1,3,5-tri-oxygenated benzenes

Naskar, Dinabandhu,Roy, Amrita,Seibel, William L.

, p. 8861 - 8863 (2003)

1,3,5-tri-Oxygenated benzenes can serve as substrates for the Petasis boronic acid reaction, providing a practical synthetic route for the two C-C bond formation of α-(1,3,5-tri-oxygenated phenyl)carboxylic acids. The scope and limitations of this method have been examined.

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