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91658-80-9

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91658-80-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 91658-80-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,6,5 and 8 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 91658-80:
(7*9)+(6*1)+(5*6)+(4*5)+(3*8)+(2*8)+(1*0)=159
159 % 10 = 9
So 91658-80-9 is a valid CAS Registry Number.

91658-80-9Downstream Products

91658-80-9Relevant articles and documents

Impact of substituents on the isatin ring on the reaction between isatins with ortho-phenylenediamine

Dowlatabadi, Reza,Khalaj, Ali,Rahimian, Sima,Montazeri, Maedeh,Amini, Mohsen,Shahverdi, Ahmadreza,Mahjub, Elham

, p. 1650 - 1658 (2011)

The reaction of different substituted isatins with ortho-phenylenediamine in acetic acid has been investigated. While electron-donor substituents on isatin shift the reaction toward classical 6H-indolo[2,3-b]quinoxaline ring closure, electron-withdrawing

Facile synthesis of quinoxaline annulated perfluoroalkylated benzoazepine derivatives

Liu, Gang,Sun, Xuechun,Chen, Ling,Wu, Yueci,Han, Jing,Chen, Jie,Deng, Hongmei,Shao, Min,Zhang, Hui,Cao, Weiguo

, p. 108154 - 108157 (2016/11/30)

Novel perfluoroalkylated benzoazepinoquinoxaline derivatives were synthesized by consecutive intermolecular Michael addition and intramolecular cyclization from 3-(2-aminophenyl)quinoxalin-2(1H)-ones and methyl perfluoroalk-2-ynoates in good yields. This

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