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111999-51-0

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111999-51-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 111999-51-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,9,9 and 9 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 111999-51:
(8*1)+(7*1)+(6*1)+(5*9)+(4*9)+(3*9)+(2*5)+(1*1)=140
140 % 10 = 0
So 111999-51-0 is a valid CAS Registry Number.

111999-51-0Downstream Products

111999-51-0Relevant articles and documents

Electrophilic Substitution Reaction at Azomethine Carbon Atom. Acylation of Aliphatic Aldehyde Hydrazones

Kamitori, Yasuhiro,Hojo, Masaru,Msuda, Ryoichi,Yoshida, Tatsushi,Ohara, Seiji,et al.

, p. 519 - 526 (2007/10/02)

Formaldehyde dialkylhydrazones were found to undergo an electrophilic substitution reaction very easily at the azomethine carbon atom when treated with trifluoroacetic anhydride.Bistrifluoroacetylation is also possible.As an interesting extension of this reaction, trifluoroacetylation of dialkylhydrazones of aliphatic aldehydes and α,β-unsaturated aldehydes, was achieved.Similar reactions of these hydrazones with some other acylating reagents were also studied.

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