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13210-18-9

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13210-18-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 13210-18-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,2,1 and 0 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 13210-18:
(7*1)+(6*3)+(5*2)+(4*1)+(3*0)+(2*1)+(1*8)=49
49 % 10 = 9
So 13210-18-9 is a valid CAS Registry Number.

13210-18-9Downstream Products

13210-18-9Relevant articles and documents

Manganese(III)-Mediated Carbon-Carbon Bond Formation in the Reaction of Xanthenes with Active Methylene Compounds

Nishino, Hiroshi,Kamachi, Hironori,Baba, Harumi,Kurosawa, Kazu

, p. 3551 - 3557 (2007/10/02)

Oxidation of xanthenes with manganese(III) acetate in the presence of active methylene compounds such as 1,3-dicarbonyl compounds, malononitrile derivatives, acetone, and nitromethane selectively gives 9-substituted xanthene derivatives in good yields.A similar oxidation of thioxanthene also yields 2-(9-thioxanthenyl)-1,3-dicarbonyl compounds in 57-91 percent yields.The obtained 2-(9-xanthenyl)-1,3-dicarbonyl compounds are readily converted to 2-(9-xanthenylidene)-1,3-dicarbonyl derivatives using manganese(III) complexes or 2,3-dichloro-5,6-dicyano-1,4-benzoquinone.The mechanisms for the formation of 9-substituted xanthenes are discussed on the basis of the reaction intermediates, the electron-donating substituent effect on the xanthene ring system, effect of additives, and comparison with a reaction of radical-trapping reagents.

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