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21945-76-6

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21945-76-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 21945-76-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,9,4 and 5 respectively; the second part has 2 digits, 7 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 21945-76:
(7*2)+(6*1)+(5*9)+(4*4)+(3*5)+(2*7)+(1*6)=116
116 % 10 = 6
So 21945-76-6 is a valid CAS Registry Number.

21945-76-6Relevant articles and documents

Formylation of electron-rich aromatic rings mediated by dichloromethyl methyl ether and TiCl4: Scope and limitations

Ramos-Tomillero, Iván,Paradís-Bas, Marta,De Pinho Ribeiro Moreira, Ibério,Bofill, Josep María,Nicolás, Ernesto,Albericio, Fernando

, p. 5409 - 5422 (2015)

Here the aromatic formylation mediated by TiCl4 and dichloromethyl methyl ether previously described by our group has been explored for a wide range of aromatic rings, including phenols, methoxy- and methylbenzenes, as an excellent way to produce aromatic aldehydes. Here we determine that the regioselectivity of this process is highly promoted by the coordination between the atoms present in the aromatic moiety and those in the metal core.

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