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123043-93-6

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123043-93-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 123043-93-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,3,0,4 and 3 respectively; the second part has 2 digits, 9 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 123043-93:
(8*1)+(7*2)+(6*3)+(5*0)+(4*4)+(3*3)+(2*9)+(1*3)=86
86 % 10 = 6
So 123043-93-6 is a valid CAS Registry Number.

123043-93-6Downstream Products

123043-93-6Relevant articles and documents

Synthesis and Reactions of "Biginelli-Compounds". Part I

Kappe, Christian Oliver,Roschger, Peter

, p. 55 - 64 (2007/10/02)

Various reactions of 2-oxo (or thioxo)-1,2,3,4-tetrahydropyrimidine-5-carboxylic acid derivatives (Biginelli-compounds) were investigated.The site of methylation and acylation on 6-methyl-4-phenyl-2-thioxo-1,2,3,4-tetrahydropyrimidine-5-carboxylic acid ethyl ester 1a and its 2-oxo derivative 9a was studied.The synthesis of pyrimidothiazines and thiazolopyrimidines was accomplished by condensation of 1a with 1,3- and 1,2-dielectrophiles.A Dimroth-like rearrangement yielding 6H-1,3-thiazines can be observed when 1a was treated with dimethylformamide and phosphorus oxychloride.The formation of indenopyrimidines can be achieved by intramolecular Friedl-Crafts acylation of 9a and 13, respectively.Finally a route for the preparation of 4,6-disubstituted-pyrimidine-5-carbonitriles is presented, starting with Biginelli-compound 25.

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