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128165-24-2

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128165-24-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128165-24-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,1,6 and 5 respectively; the second part has 2 digits, 2 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 128165-24:
(8*1)+(7*2)+(6*8)+(5*1)+(4*6)+(3*5)+(2*2)+(1*4)=122
122 % 10 = 2
So 128165-24-2 is a valid CAS Registry Number.

128165-24-2Downstream Products

128165-24-2Relevant articles and documents

Aza-enamines, VIII. - Electrophilic Substitution reactions at the Azomethine C-Atom of Aldehyde Dialkylhydrazones: Vilsmeier Formylation and Consecutive Reactions

Brehme, Rainer

, p. 2039 - 2046 (2007/10/02)

The reaction of hydrazones 1 with the Vilsmeier reagent yields 3-phenyl-1,4,5-triaza-1,3-pentadienium salts according to their aza-enamine character.Hydrolysis of 2 gives 1-phenylglyoxal 1-dialkylhydrazones 3, which rearrange in acidic media to 1-phenylglyoxal 2-dialkylhydrazones 4.Compound 3h forms the dihydropyrroloimidazole 5 in boiling ethanol.Pyrrolotriazinium salt 6 is obtained by the reaction of 1b with the isolated Vilsmeier reagent from dimethylformamide/oxalyl chloride.

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