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253435-17-5

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253435-17-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 253435-17-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,5,3,4,3 and 5 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 253435-17:
(8*2)+(7*5)+(6*3)+(5*4)+(4*3)+(3*5)+(2*1)+(1*7)=125
125 % 10 = 5
So 253435-17-5 is a valid CAS Registry Number.

253435-17-5Relevant articles and documents

A direct anionic cyclization of 2-alkynylbenzonitrile to 3- substituted-1(2H)-isoquinolones and 3-benzylideneisoindol-2ones initiated by methoxide addition

Wu, Ming-Jung,Chang, Li-Juan,Wei, Li-Mei,Lin, Chi-Fong

, p. 13193 - 13200 (1999)

Treatment of 2-(2-alkylethynyl)benzonitrile with sodium methoxide in refluxing methanol for 12 h gave 3-alkyl-1(2H)- isoquinolone in modest yield. Under the same reaction conditions, methanolysis of 2-(2-arylethynyl)benzonitrile lead to the formation of 3

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