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1172640-31-1

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1172640-31-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1172640-31-1 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,7,2,6,4 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1172640-31:
(9*1)+(8*1)+(7*7)+(6*2)+(5*6)+(4*4)+(3*0)+(2*3)+(1*1)=131
131 % 10 = 1
So 1172640-31-1 is a valid CAS Registry Number.

1172640-31-1Relevant articles and documents

Concave 1,10-phenanthrolines as ligands for cyclopropanations - Towards a deeper understanding of the stereoselectivity

Eggers, Friederike,Luening, Ulrich

experimental part, p. 2328 - 2341 (2009/09/05)

Four new mono- and bimacrocyclic 1,10-phenanthrolines - 3b and 4a-c - containing aryl bridgeheads have been synthe- sised. The etherification of the aryl bridgeheads was accomplished by Williamson or Mitsunobu reactions. A key step in the synthesis of the macrocyclic phenanthrolines 3 and 4 is the Suzuki coupling of 2,9-diiodo-1,10-phenan- throline (12) with the appropriately substituted boronic acids 17 and 20. Ring-closing metathesis and hydrogenation completed the synthesis. The resulting macrocyclic 1,10-phenan- throlines 3b and 4a-c were tested as ligands in a copper(I)- catalysed stereoselective cyclopropanation.

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