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340-19-2

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340-19-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 340-19-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 3,4 and 0 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 340-19:
(5*3)+(4*4)+(3*0)+(2*1)+(1*9)=42
42 % 10 = 2
So 340-19-2 is a valid CAS Registry Number.

340-19-2Downstream Products

340-19-2Relevant articles and documents

Facile Aromatization Reactions of Overcrowded Polycyclic Aromatic Enes Leading to Fullerene Fragments

Pogodin, Sergey,Biedermann, P. Ulrich,Agranat, Israel

, p. 2285 - 2287 (1997)

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A new Suzuki-Heck-type coupling cascade: Indeno[1,2,3]-annelation of polycyclic aromatic hydrocarbons

Wegner, Hermann A.,Scott, Lawrence T.,De Meijere, Armin

, p. 883 - 887 (2007/10/03)

Under palladium catalysis, o-bromobenzeneboronic acid can be coupled with 1-bromonaphthalene (6) and with oligocyclic bromoarenes to furnish indeno-annelated polycyclic aromatic hydrocarbons 1-4 and 25 in a single operation in moderate to good yields (27-87%). Alternatively, o-dibromoarenes and 1,2-dibromocycloalkenes can be cross-coupled with 1-naphthaleneboronic acid under the same conditions to yield analogous products (6-87%), and indenocorannulene (19) can be prepared likewise in a single step from pinacol corannuleneboronate (18) (40%).

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