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161465-86-7

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161465-86-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 161465-86-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,4,6 and 5 respectively; the second part has 2 digits, 8 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 161465-86:
(8*1)+(7*6)+(6*1)+(5*4)+(4*6)+(3*5)+(2*8)+(1*6)=137
137 % 10 = 7
So 161465-86-7 is a valid CAS Registry Number.

161465-86-7Relevant articles and documents

Efficient method for the synthesis of pyridopyrimidin-5-ones from 4-amino-5-acetylpyrimidines

Komkov, A. V.,Ugrak, B. I.,Bogdanov, V. S.,Dorokhov, V. A.

, p. 1392 - 1397 (1994)

New method for annelation of a pyridine ring to a pyrimidine ring were suggested.Substituted 8H-pyridopyrimidin-5-ones (8a-f) were synthesized by the interaction of 2,6-disubstituted 4-amino-5-acetylpyrimidines (1-4) with formamide or acetamide acetals followed by cyclization under the action of sodium methoxide in methanol. 2,4-Disubstituted 7-phenyl-8H-pyridopyrimidin-5-ones (11a-c) were propared by the reaction of 2,6-disubstituted 5-acetyl-4-benzoylaminopyrimidines (10a-c) with MeONa in boiling BuOH. - Key words: 4-amino-5-acetylpyrimidines, 4-benzoylamino-5-acetylpyrimidines, dimethylformamide dimethylacetal, dimethylacetamide dimethylacetal, pyridopyrimidin-5-ones.

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