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16458-22-3

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16458-22-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 16458-22-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,6,4,5 and 8 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 16458-22:
(7*1)+(6*6)+(5*4)+(4*5)+(3*8)+(2*2)+(1*2)=113
113 % 10 = 3
So 16458-22-3 is a valid CAS Registry Number.

16458-22-3Relevant articles and documents

First intermolecular palladium catalyzed arylation of an unfunctionalized aromatic hydrocarbon

Dyker, Gerald,Borowski, Stefan,Heiermann, J?rg,K?rning, Jutta,Opwis, Klaus,Henkel, Gerald,K?ckerling, Martin

, p. 108 - 111 (2007/10/03)

Azulene is arylated by iodobenzene and by 4-nitro-chlorobenzene under palladium catalysis at the electron-rich 1-position.

A Versatile Synthetic Method of 1-Alkylazulenes and Azulene by the Reactions of 3-Methoxycarbonyl-2H-cycloheptafuran-2-one with in situ Generated Enamines

Yasunami, Masafumi,Miyoshi, Shiro,Kanegae, Noriko,Takase, Kahei

, p. 892 - 899 (2007/10/02)

Methyl 3-alkylazulene-1-carboxylates were synthesized in high yields by the reaction of 3-methoxycarbonyl-2H-cycloheptafuran-2-one with in situ generated morpholine enamines of aldehydes.Treatment of the esters with 100percent phosphoric acid gave 1-alkylazulenes in excellent yields.Azulene was also synthesized in a good yield via methyl azulene-1-carboxylate with a modification of this method.

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