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42797-59-1

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42797-59-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 42797-59-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,2,7,9 and 7 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 42797-59:
(7*4)+(6*2)+(5*7)+(4*9)+(3*7)+(2*5)+(1*9)=151
151 % 10 = 1
So 42797-59-1 is a valid CAS Registry Number.

42797-59-1Downstream Products

42797-59-1Relevant articles and documents

An improved synthesis of 2-diazo-1,3-diketones

Popic,Korneev,Nikolaev,Korobitsyna

, p. 195 - 198 (2007/10/02)

The sodium hydride/dibenzo-18-crown-6 ether system was found to be an effective base for the synthesis of 1,3-diketones by the Claisen condensation. The use of potassium fluoride (with or without crown ether) as the base in diazo-transfer reactions extends this reaction to the synthesis of hindered diazo diketones. In the case of isomeric 1,3-diketones, the stereoselectivity of the process considerably rises.

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