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140870-34-4

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140870-34-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 140870-34-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,0,8,7 and 0 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 140870-34:
(8*1)+(7*4)+(6*0)+(5*8)+(4*7)+(3*0)+(2*3)+(1*4)=114
114 % 10 = 4
So 140870-34-4 is a valid CAS Registry Number.

140870-34-4Relevant articles and documents

Synthesis of analogues of porphobilinogen

Leeper, Finian J.,Rock, Martin,Appleton, Diana

, p. 2633 - 2642 (2007/10/03)

Syntheses are described of several analogues of porphobilinogen intended as substrates and/or inhibitors of porphobilinogen deaminase (hydroxymethylbilane synthase). 2-Methylporphobilinogen 12 has been synthesised from α-methylpyrrole 6, whereas a phosphonate analogue 20 of porphobilinogen, 8,9-didehydroporphobilinogen 26 and 9-fluoroporphobilinogen 38 have all been made from the 1H-pyrrolo[2,3-c]pyridine 14. The best route to 38 avoids fluoroacrylate 28 because of loss of fluorine during reduction of the double bond.

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