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134079-95-1

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134079-95-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 134079-95-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,4,0,7 and 9 respectively; the second part has 2 digits, 9 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 134079-95:
(8*1)+(7*3)+(6*4)+(5*0)+(4*7)+(3*9)+(2*9)+(1*5)=131
131 % 10 = 1
So 134079-95-1 is a valid CAS Registry Number.

134079-95-1Downstream Products

134079-95-1Relevant articles and documents

A Novel One-Step Synthesis of 4H-Furopyrans and a Transformation into a Difuropyridine

Martin, Nazario,Segura, Jose L.,Seoane, Carlos,Soto, Jose L.,Morales, Margarita,Suarez, Margarita

, p. 827 - 830 (2007/10/02)

A simple one-step synthesis of 2-amino-4-aryl-5-oxo-4H-furopyran-3-carbonitriles 7 is described.It involves reaction of 2,4(3H,5H)-furandione (β-tetronic acid) (5) with arylmethylenemalononitriles 4 in basic medium.Some substituent effects are noted and the assignments of 13C-NMR spectra are discussed.Ring transformation of the furopyran 7a leads to the difuropyridine 9.Key Words: Furopyrans / Difuropyridine / β-Tetronic acid / Malononitriles, arylmethylene-

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