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139021-59-3

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139021-59-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139021-59-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,0,2 and 1 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 139021-59:
(8*1)+(7*3)+(6*9)+(5*0)+(4*2)+(3*1)+(2*5)+(1*9)=113
113 % 10 = 3
So 139021-59-3 is a valid CAS Registry Number.

139021-59-3Relevant articles and documents

Synthesis of polycyclic lactams and sultams by a cascade ring-closure metathesis/isomerization and subsequent radical cyclization

Bressy, Cyril,Menant, Christine,Piva, Olivier

, p. 577 - 582 (2007/10/03)

Starting from readily available substrates, a new one-pot procedure has been devised to prepare polycyclic lactams and sultams. 2-Pyrrolines obtained from N,N-bisallylamides by ring-closure metathesis and subsequent isomerization promoted by ruthenium hyd

Sequential and cascade olefin metathesis - Intramolecular heck reaction

Grigg, Ronald,Sridharan, Visuvanathan,York, Mark

, p. 4139 - 4142 (2007/10/03)

The sequential or cascade combination olefin metathesis with intramolecular Heck reactions provides access to fused-, bridged- and spiro- cyclic ring systems in good yield.

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