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128190-41-0

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128190-41-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128190-41-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,1,9 and 0 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 128190-41:
(8*1)+(7*2)+(6*8)+(5*1)+(4*9)+(3*0)+(2*4)+(1*1)=120
120 % 10 = 0
So 128190-41-0 is a valid CAS Registry Number.

128190-41-0Downstream Products

128190-41-0Relevant 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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