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84670-23-5

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84670-23-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 84670-23-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,4,6,7 and 0 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 84670-23:
(7*8)+(6*4)+(5*6)+(4*7)+(3*0)+(2*2)+(1*3)=145
145 % 10 = 5
So 84670-23-5 is a valid CAS Registry Number.

84670-23-5Relevant articles and documents

Reaction of 2-Carboxy-1-methylindole-3-acetic Acid Anhydride with Amines and with S-Methylisothiosemicarbazide

Ali, M. I.,Abdel-Fattah, A. M.,Hussain, S. M.,El-Reedy, A. M.

, p. 993 - 996 (2007/10/02)

2-Carboxy-1-alkylindole-3-acetic acid anhydrides (I) condensed with S-methylisothiosemicarbazide in DMF to form 5,11-dihydro-6-methyl-2-methylthioindolopyrido-s-triazol-5-one (II).Compound II underwent ring opening on refluxing with sodium hydroxide solution to give IV.The anhydride I reacted with primary amines in benzene to give 2-carboxy-1-alkylindole-3-acetanilide derivatives (VI) which yielded 1-methylindole-3-acetic acid by decarboxylation followed by hydrolysis.Compound II oxidised to the diketo compound X which could be prepared by the hydrolysis of the azomethine derivative IX with acetic acid-hydrochloric acid mixture.Compound II reacted with benzyl chloride to yield the dibenzyl derivative XII, condensed with p-chlorobenzaldehyde to form the 11-p-chlorobenzylidene derivative XI and coupled with arenediazonium salt to give the 11-arylhydrazone derivatives XIII.

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