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19958-58-8

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19958-58-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 19958-58-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,9,5 and 8 respectively; the second part has 2 digits, 5 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 19958-58:
(7*1)+(6*9)+(5*9)+(4*5)+(3*8)+(2*5)+(1*8)=168
168 % 10 = 8
So 19958-58-8 is a valid CAS Registry Number.

19958-58-8Relevant articles and documents

Synthesis of N-acetoxy-N-arylamides via diacetoxyiodobenzene promoted double acylation reaction of hydroxylamines with aldehydes

Zhang, Huaiyuan,Su, Yingpeng,Wang, Ke-Hu,Huang, Danfeng,Li, Jun,Hu, Yulai

supporting information, p. 5337 - 5344 (2017/07/10)

A facile and efficient synthesis of N-acetoxy-N-arylamides through double acylations of hydroxylamines with aldehydes and diacetoxyiodobenzene is reported. The yields of the products are good to excellent.

Transition-Metal-Free Synthesis of N-Aryl Hydroxamic Acids via Insertion of Arynes

Zhang, Lanlan,Geng, Yu,Jin, Zhong

, p. 3542 - 3552 (2016/05/24)

An efficient and transition-metal-free N-arylation of amides via the insertion of arynes into the N-H bonds in the N-alkoxy amides is described. A variety of the reactive functional groups including the reactive aldehyde carbonyl group, furan ring, carbon-carbon double bonds, and free N-H bond of indole are found to be compatible with this process. In particular, the protocol is applicable in the synthesis of structurally diverse N-aryl hydroxamates and hydroxamic acids derived from N-protecting amino acids and peptides. In the presence of multiple amide N-H bonds, the N-arylation reaction can proceed selectively in the N-H bonds of terminal N-OBn amides giving rise to the desired N-aryl hydroxamates.

Synthesis and characterization of model ultimate carcinogens/metabolites derived from lead tetraacetate oxidation of arylnitrones: 2′-Deoxyguanosine adducts

Mallesha,Kumar,Mantelingu,Rangappa

, p. 1459 - 1461 (2007/10/03)

The synthesis of model reactive metabolites 4a-c by lead tetraacetate (LTA) oxidation of arylnitrones 3a-c is described. Compounds 4a-c react with deoxyguanosine (dG) to give N-benzoylated C8-adducts 5a-c. Following debenzoylation with the heterogeneous system (sodium carbonate/methanol) leads to the corresponding C8-adducts 6a-c.

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