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4491-46-7

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4491-46-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 4491-46-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,9 and 1 respectively; the second part has 2 digits, 4 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 4491-46:
(6*4)+(5*4)+(4*9)+(3*1)+(2*4)+(1*6)=97
97 % 10 = 7
So 4491-46-7 is a valid CAS Registry Number.

4491-46-7Relevant articles and documents

Cobalt-Catalyzed Highly Regioselective Three-Component Arylcarboxylation of Acrylate with Aryl Bromides and Carbon Dioxide

Hang, Wei,Liang, Nianjie,Liu, Yuzhou,Xi, Chanjuan

, p. 4941 - 4946 (2021/10/30)

Cobalt-catalyzed regioselective three-component arylcarboxylation of acrylate with aryl bromides and carbon dioxide has been developed. The reaction is carried out by using cobalt chloride as a precatalyst and zinc powder as a reducing reagent under CO2 (1 atm) at 40 °C. A range of aryl bromides are used for this reaction, leading to a series of valuable carboxylic acids with high regioselectivity and functional-group compatibility. Mechanistic experiments and DFT calculations indicate that this arylcarboxylation reaction involves the reaction of CO2 with a cobalt enolate intermediate to form the C?C bond.

Enantioselective α-Benzoyloxylation of Malonic Diesters by Phase-Transfer Catalysis

Kanemitsu, Takuya,Sato, Miho,Yoshida, Miyuki,Ozasa, Eisuke,Miyazaki, Michiko,Odanaka, Yuki,Nagata, Kazuhiro,Itoh, Takashi

supporting information, p. 5484 - 5487 (2016/11/17)

A highly enantioselective α-benzoyloxylation of malonic diester has been achieved by phase-transfer catalysis. The reaction of α-monosubstituted tert-butyl methyl malonate with benzoyl peroxide in the presence of aqueous KOH and N-(9-anthracenylmethyl)cinchoninium chloride afforded the corresponding α,α-disubstituted products in generally excellent chemical yields (up to 99% yield) with high enantioselectivities (up to 96% ee). In addition, the utility of this methodology was exhibited by the synthesis of a mineralocorticoid receptor antagonist.

Iron(iii)-salan complexes catalysed highly enantioselective fluorination and hydroxylation of β-keto esters and N-Boc oxindoles

Gu, Xin,Zhang, Yan,Xu, Zhen-Jiang,Che, Chi-Ming

, p. 7870 - 7873 (2014/07/08)

Chiral iron(iii)-salan complexes catalysed highly enantioselective α-fluorination and α-hydroxylation of β-keto esters and N-Boc oxindoles to give the corresponding products in high yields and good-to-excellent ee values under mild reaction conditions. This journal is the Partner Organisations 2014.

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