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97031-68-0

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97031-68-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 97031-68-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,7,0,3 and 1 respectively; the second part has 2 digits, 6 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 97031-68:
(7*9)+(6*7)+(5*0)+(4*3)+(3*1)+(2*6)+(1*8)=140
140 % 10 = 0
So 97031-68-0 is a valid CAS Registry Number.

97031-68-0Relevant articles and documents

Efficient synthesis of 3,5-dicarbamoyl-1,4-dihydropyridines from pyridinium salts: Key molecules in understanding NAD(P)+/NAD(P)H pathways

Mellini, Paolo,De Vita, Daniela,Di Rienzo, Barbara,La Rosa, Salvatore,Padova, Alessandro,Scipione, Luigi,Tortorella, Silvano,Friggeri, Laura

, p. 221 - 226 (2015)

3,5-Dicarbamoyl-1,4-dihydropyridines were prepared in high yields using a green protocol by reduction of the corresponding pyridinium salts in aqueous buffered sodium dithionite solutions. The pH value is a fundamental parameter for the reduction step and depends on the nature of substituent groups at positions 1, 3, and 5 of the pyridinium salts. These 3,5-dicarbamoyl dihydropyridines show a lower tendency towards oxidation and a higher stability than N-benzyl-3-carbamoyl-1,4-dihydropyridine at low pH values.

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