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1328880-40-5

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1328880-40-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1328880-40-5 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,2,8,8,8 and 0 respectively; the second part has 2 digits, 4 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 1328880-40:
(9*1)+(8*3)+(7*2)+(6*8)+(5*8)+(4*8)+(3*0)+(2*4)+(1*0)=175
175 % 10 = 5
So 1328880-40-5 is a valid CAS Registry Number.

1328880-40-5Downstream Products

1328880-40-5Relevant articles and documents

K2CO3-mediated synthesis of functionalised 4-substituted-2-amino-3-cyano-4H-chromenes via michael-cyclization reactions

He, Yanyang,Hu, Rong,Li, Fengqiong,Zhang, Mei,Tong, Rongsheng,Shi, Jianyou

, p. 19253 - 19268 (2014)

An efficient approach for the synthesis of functionalized 4-substituted-2-amino-3-cyano-4H-chromenes moderate to high yields (up to 98%) has been achieved via a tandem K2CO3 catalyzed conjugate addition-cyclization reaction of malononitrile and a range of Knoevenagel adducts previously formed from oxindole, pyrazolone, nitromethane, N,N-dimethylbarbituric acid or indanedione. This methodology differs from the previous classical methods in its simplicity and ready availability of the catalyst.

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