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139459-13-5

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139459-13-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 139459-13-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,9,4,5 and 9 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 139459-13:
(8*1)+(7*3)+(6*9)+(5*4)+(4*5)+(3*9)+(2*1)+(1*3)=155
155 % 10 = 5
So 139459-13-5 is a valid CAS Registry Number.

139459-13-5Downstream Products

139459-13-5Relevant articles and documents

Dipolar cyclization reactions in heterocyclic synthesis: A novel route to furanophanes

Eberbach,Laber

, p. 57 - 60 (2007/10/02)

The multistep transformation of 2,3-bridged butenynyl oxiranes 8 into furanophanes 12 involving bridgehead olefins 11 as key intermediates is described. The two lower members of 12 undergo rapid air oxidation resulting in the formation of the dienediones 14a,b. 14b is converted by base into the bicyclo[6.3.0]undecadienone 15.

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