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3439-92-7

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3439-92-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 3439-92-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,4,3 and 9 respectively; the second part has 2 digits, 9 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 3439-92:
(6*3)+(5*4)+(4*3)+(3*9)+(2*9)+(1*2)=97
97 % 10 = 7
So 3439-92-7 is a valid CAS Registry Number.

3439-92-7Relevant articles and documents

THE SYNTHESIS OF RIGID NORBORNYLOGS FOR THE PURPOSE OF STUDYING ORBITAL INTERACTIONS THROUGH BONDS

Paddon-Row, Michael N.,Cotsaris, Evangelo,Patney, Harish K.

, p. 1779 - 1788 (2007/10/02)

The synthesis of members of the series of rigid bichromophoric norbornylogs 4-8 is described.Dienes 4a and b were synthesized according to Scheme 1.Reductive dechlorination of 26-28 (Scheme 2) gave dienes 5b-d, respectively.Benzene annelation of the appropriate ene substrate, using tetrachlorodimethoxycyclopentadiene, as outlined in Scheme 3, gave the dibenzo compounds 6a-c.The dibromoquinodimethane intermediate 49 was trapped by the appropriate diene to give the bisnaphtho compounds 7a-c.The extended norbornylogs 8a and b were synthesized using a combination of metal catalyzed (2+2) cycloaddition of DMAD and (2+2+2) cycloaddition of quadricyclane to ene substrates (Scheme 5).The photoelectron spectra of some of the dienes are discussed in terms of through bond orbital interactions.

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