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77896-04-9

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77896-04-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 77896-04-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,7,8,9 and 6 respectively; the second part has 2 digits, 0 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 77896-04:
(7*7)+(6*7)+(5*8)+(4*9)+(3*6)+(2*0)+(1*4)=189
189 % 10 = 9
So 77896-04-9 is a valid CAS Registry Number.

77896-04-9Relevant articles and documents

Spirodienones. Part 2. The Synthesis of Some Heterocyclic Spirodienones by Phenolic Coupling

Coutts, Ian G. C.,Hamblin, Michael R.,Welsby, Sheila E.

, p. 493 - 497 (2007/10/02)

The oxidation with active manganese dioxide of a series of 2,4'-dihydroxydiphenyl ethers to the corresponding p-benzoquinone monoacetals (1,3-benzodioxole-2-spirocyclohexadien-4'-ones) is described; among the dienones prepared were monoacetals of nitro-p-benzoquinone and of p-fluoranil.Attempted ether formation with 2,6-di-t-butyl-4-bromophenol and either 2- or 3-methoxyphenol failed, small quantities of unsymmetric biphenyls being formed in a novel arylation reaction.A spirobenzoxazole can be prepared by oxidation of a 2,4'-dihydroxydiphenylamine.Substituent effects in the hydrolysis of derived spirodienols have been observed.

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