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2453-91-0

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2453-91-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 2453-91-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,4,5 and 3 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2453-91:
(6*2)+(5*4)+(4*5)+(3*3)+(2*9)+(1*1)=80
80 % 10 = 0
So 2453-91-0 is a valid CAS Registry Number.

2453-91-0Relevant articles and documents

Direct Amidation of Esters by Ball Milling**

Barreteau, Fabien,Battilocchio, Claudio,Browne, Duncan L.,Godineau, Edouard,Leitch, Jamie A.,Nicholson, William I.,Payne, Riley,Priestley, Ian

, p. 21868 - 21874 (2021)

The direct mechanochemical amidation of esters by ball milling is described. The operationally simple procedure requires an ester, an amine, and substoichiometric KOtBu and was used to prepare a large and diverse library of 78 amide structures with modest to excellent efficiency. Heteroaromatic and heterocyclic components are specifically shown to be amenable to this mechanochemical protocol. This direct synthesis platform has been applied to the synthesis of active pharmaceutical ingredients (APIs) and agrochemicals as well as the gram-scale synthesis of an active pharmaceutical, all in the absence of a reaction solvent.

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