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109703-80-2

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109703-80-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 109703-80-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,7,0 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 109703-80:
(8*1)+(7*0)+(6*9)+(5*7)+(4*0)+(3*3)+(2*8)+(1*0)=122
122 % 10 = 2
So 109703-80-2 is a valid CAS Registry Number.

109703-80-2Relevant articles and documents

Heterocyclen aus α-Nitroolefinen. XII. 3-Acetyl-4,5-dihydro-5-(methyleneamino)furane und 3-Acylpyrrole aus α-Nitroolefinen und β-Diketonen

Boberg, Friedrich,Garburg, Karl-Heinz,Goerlich, Karl-Joachim,Pipereit, Eberhard,Redelfs, Elke,Ruhr, Maria

, p. 1853 - 1859 (2007/10/02)

From α-nitroolefines 1 and β-diketones 2 3-acetyl-4,5-dihydro-5-(methyleneamino)furans 5 are prepared.Furans 5 react in acid medium to yield 1-unsubstituted 3-acylpyrroles 6, catalytic hydrogenation yields 1-substituted 3-acylpyroles 9.The (1)H-nmr and (13)C-nmr investigation prove the constitutions.

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