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853799-21-0

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853799-21-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 853799-21-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 8,5,3,7,9 and 9 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 853799-21:
(8*8)+(7*5)+(6*3)+(5*7)+(4*9)+(3*9)+(2*2)+(1*1)=220
220 % 10 = 0
So 853799-21-0 is a valid CAS Registry Number.

853799-21-0Relevant articles and documents

Synthesis of substituted benzoindolinothiazepines using 5- And 6-nitroindolines

Laconde,Depreux,Berthelot,Henichart

, p. 39 - 43 (2007/10/03)

The synthesis of benzoindolothiazepine compounds was investigated using Friedel-Crafts reactions conditions from indolines. The amine function of indolinic identity was protected to avoid an alkylation of this function by methyl iodide. It was observed that the treatment of the desired amines with commercially available methyl chlorosulfanoylbenzonate resulted in the formation of sulfonamide compounds. It was also observed that the cyclization of the carboxylic acid under Friedel-Crafts conditions resulted in the formation of the desired tetracycles.

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