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91132-81-9

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91132-81-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91132-81-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,1,3 and 2 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 91132-81:
(7*9)+(6*1)+(5*1)+(4*3)+(3*2)+(2*8)+(1*1)=109
109 % 10 = 9
So 91132-81-9 is a valid CAS Registry Number.

91132-81-9Relevant articles and documents

Photoinduced C—C Bond Cleavage and Oxidation of Cycloketoxime Esters

Zhao, Binlin,Tan, Hui,Chen, Cheng,Jiao, Ning,Shi, Zhuangzhi

, p. 995 - 999 (2018/09/25)

A novel structural reorganization of cycloketoxime esters beyond the traditional Beckmann rearrangement process has been established to build cyano-containing ketones in the presence of photocatalyst. This novel transformation is remarkable with selective C—C bond cleavage and an oxidation process enabled by DMSO used as the solvent, oxidant, and oxygen source avoiding acid, base and toxic cyanide salts as the cyano source. Further applications in late-stage modification of complex and chiral molecules have also been reported.

Selective N-debenzylation of amides with p-TsOH

Chern, Ching-Yuh,Huang, Yu-Ping,Kan, Wai Ming

, p. 1039 - 1041 (2007/10/03)

N-Benzylamides were debenzylated efficiently with 4 equiv. of p-TsOH in refluxing toluene. Good to quantitative yields of the desired primary amides were obtained within 2-4 h from a wide variety of N-2,4-dimethoxybenzylamides. N-4-Methoxylbenzyl amides and N-benzylamides were also debenzylated cleanly. In the case of N-2,4-dimethoxylbenzylamides, selective N-debenzylation was possible in the presence of N-Fmoc, N-t-BOC or N-trityl-protection. Protected amino acid amides survived these conditions without any detectable epimerization.

Synthesis of 6-Hydroxy-3,4,5,6-tetrahydro-2-pyridones and 3,4-Dihydro-2-pyridones by H2O2/DMSO Hydration of δ-Ketonitriles

Citterio, Attilio,Carnevali, Elena,Farina, Alessandra,Meille, Valdo,Alini, Stefano,Cotarca, Livius

, p. 465 - 470 (2007/10/03)

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