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156777-89-8

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156777-89-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 156777-89-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,6,7,7 and 7 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 156777-89:
(8*1)+(7*5)+(6*6)+(5*7)+(4*7)+(3*7)+(2*8)+(1*9)=188
188 % 10 = 8
So 156777-89-8 is a valid CAS Registry Number.

156777-89-8Relevant articles and documents

Ruthenium-catalyzed ring-closing metathesis to form tetrasubstituted olefins

Berlin, Jacob M.,Campbell, Katie,Ritter, Tobias,Funk, Timothy W.,Chlenov, Anatoly,Grubbs, Robert H.

, p. 1339 - 1342 (2007)

Figure presented Increased efficiency for ring-closing metathesis to form tetrasubstituted olefins using N-heterocyclic carbene ligated ruthenium catalysts was achieved by reducing the size of the substituants at the ortho positions of the N-bound aryl ri

The Synthesis of Some Lipophilic Tetradentate Ligands for Use in the Formation of Metal-Linked Polymers

Crossley, Maxwell J.,Gorjian, Sargon,Sternhell, Sever,Tansey, Kerrie M.

, p. 723 - 738 (2007/10/02)

Two lipophilic tetradentate ligands, 5,5'-di-t-butyl- and 5,5'-dihexyl-2,2'-bipyrimidine, were prepared via either Ullmann or nickel(0)-promoted reactions in low but useful yields.Approaches towards the synthesis of lipophilic ligands based on 2,2'-biimidazole, namely 4,4',5,5'-tetrabutyl-2,2'-biimidazole (from decane-4,5-dione) and various 4,4',5,5'-tetra(arylamino)-2,2'-biimidazoles (from 4,4',5,5'-tetrabromo-2,2'-biimidazole and arylamines), and a 2,2'-bibenzimidazole, 5,5',6,6'-tetra(octyloxy)-2,2'-bibenzimidazole (from N,N'-bisoxamide), were uniformly unsuccessful for preparing the 2,2'-biheteroaryl compounds.

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