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33974-39-9

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33974-39-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 33974-39-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 3,3,9,7 and 4 respectively; the second part has 2 digits, 3 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 33974-39:
(7*3)+(6*3)+(5*9)+(4*7)+(3*4)+(2*3)+(1*9)=139
139 % 10 = 9
So 33974-39-9 is a valid CAS Registry Number.

33974-39-9Downstream Products

33974-39-9Relevant articles and documents

Chemo- and product-selective electrooxidation of 3-(arylthiomethyl)- Δ3-cephems

Tanaka, Hideo,Tokumaru, Yoshihisa,Fukui, Ken-Ichi,Kuroboshi, Manabu,Torii, Sigeru,Jutand, Anny,Amatore, Christian

experimental part, p. 3449 - 3459 (2010/02/28)

Electrolysis of 3-arylthiomethyl-Δ3-cephems possessing various substituents on the arylthio moiety undergo chemo selective and product-selective electrooxidation to give several different products. These include isomeric mixtures of the corresponding methoxylated cephems, a bis[(Δ3-cephem-3-yl)methyl]disulfide or a 3-dimethoxymethyl- Δ3-cephem. The selectivity of the oxidation is highly dependent on the nature of the substituents on the arylthio moiety which suggests that both steric and electronic effects play an important role in the electrooxidation of 3-arylthiomethyl-Δ3-cephems.

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