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191231-64-8

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191231-64-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 191231-64-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,2,3 and 1 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 191231-64:
(8*1)+(7*9)+(6*1)+(5*2)+(4*3)+(3*1)+(2*6)+(1*4)=118
118 % 10 = 8
So 191231-64-8 is a valid CAS Registry Number.

191231-64-8Downstream Products

191231-64-8Relevant articles and documents

A versatile synthetic route to dehydrobenzoannulenes via in situ generation of reactive alkynes

Bell, Michael L,Chiechi, Ryan C,Johnson, Charles A,Kimball, David B,Matzger, Adam J,Brad Wan,Weakley, Timothy J.R,Haley, Michael M

, p. 3507 - 3520 (2007/10/03)

This paper outlines the development of a protocol that allows in situ generation of unstable alkynes under Pd-catalyzed cross-coupling conditions. Cu-mediated intramolecular cyclization of the resultant α,ω-polyynes provides dehydrobenzoannulenes as singular species, in very good overall yields, and in a variety of topologies that are inaccessible by traditional routes or previously available in low yield only. In addition, we will discuss the solid-state structure and reactivity of these macrocycles, as well as the ability of the planar dehydrobenzoannulenes to support weak induced ring currents.

Carbon Networks Based on Dehydrobenoannulenes: Synthesis of Graphdiyne Substructures

Haley, Michael M.,Brand, Stephen C.,Pak, Joshua J.

, p. 835 - 838 (2007/10/03)

Keywords: alkynes; annulenes; aromaticity; carbon allotropes

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