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4166-98-7

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4166-98-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4166-98-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,1,6 and 6 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4166-98:
(6*4)+(5*1)+(4*6)+(3*6)+(2*9)+(1*8)=97
97 % 10 = 7
So 4166-98-7 is a valid CAS Registry Number.

4166-98-7Relevant articles and documents

Photocatalytic Carbinol Cation/Anion Umpolung: Direct Addition of Aromatic Aldehydes and Ketones to Carbon Dioxide

Okumura, Shintaro,Uozumi, Yasuhiro

supporting information, p. 7194 - 7198 (2021/09/22)

We have developed a new photocatalytic umpolung reaction of carbonyl compounds to generate anionic carbinol synthons. Aromatic aldehydes or ketones reacted with carbon dioxide in the presence of an iridium photocatalyst and 1,3-dimethyl-2-phenyl-2,3-dihydro-1H-benzimidazole (DMBI) as a reductant under visible-light irradiation to furnish the corresponding α-hydroxycarboxylic acids through nucleophilic addition of the resulting carbinol anions to electrophilic carbon dioxide.

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