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138613-39-5

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138613-39-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 138613-39-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,6,1 and 3 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 138613-39:
(8*1)+(7*3)+(6*8)+(5*6)+(4*1)+(3*3)+(2*3)+(1*9)=135
135 % 10 = 5
So 138613-39-5 is a valid CAS Registry Number.

138613-39-5Relevant articles and documents

Intramolecular Oxidative Coupling of Aromatic Compounds. II. The Synthesis of (2RS,3SR)- and (2RS,3RS)-2,3-Dimethyl-1,4-bis(3,4,5-trimethoxyphenyl)butan-1-one and the Determination of Stereochemistry

Krauss, Adrian S.,Taylor, Walter C.

, p. 1335 - 1340 (2007/10/02)

The C-methylation of 3-methyl-1,4-bis(3,4,5-trimethoxyphenyl)butan-1-one (9) gave in a ratio of 4:1 the diastereoisomers, (2RS,3SR)- and (2RS,3RS)-2,3-dimethyl-1,4-bis(3,4,5-trimethoxyphenyl)butan-1-one, (7) and (8) respectively.The stereochemistry of eac

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