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128991-31-1

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128991-31-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 128991-31-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,2,8,9,9 and 1 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 128991-31:
(8*1)+(7*2)+(6*8)+(5*9)+(4*9)+(3*1)+(2*3)+(1*1)=161
161 % 10 = 1
So 128991-31-1 is a valid CAS Registry Number.

128991-31-1Relevant articles and documents

Electrolytic Partial Fluorination of Organic Compounds. 19. A Novel Synthesis of Fluorothienopyridines Using Anodic Fluorination of Heterocyclic Sulfides as a Key Step

Erian, Ayman W.,Konno, Akinori,Fuchigami, Toshio

, p. 7654 - 7659 (2007/10/03)

Highly regioselective anodic monofluorination of 2-pyridyl and 4-pyrimidinyl sulfides bearing various electron-withdrawing groups were successfully carried out.The fluorinated sulfides were easily converted into 2-fluorothienopyridines in good yields.

Synthesis of imidazoline-2-yl- and of 3,4,5,6-tetrahydropyrimidine-2-yl-3-amino-thieno[2,3-b]pyridines

Leistner,Wagner,Krasselt,Dumke St.

, p. 11 - 14 (2007/10/02)

The imidazoline and the tetrahydropyrimidine derivatives of the thieno[2,3-b]pyridines were prepared by the reaction of diaminoalkanes and carbondisulfide with the aminothieno-[2,3-b]pyridines 3 or from cyanomethylthiopyridines 2, or from aminothieno[2,3-

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