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52109-89-4

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52109-89-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 52109-89-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,2,1,0 and 9 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 52109-89:
(7*5)+(6*2)+(5*1)+(4*0)+(3*9)+(2*8)+(1*9)=104
104 % 10 = 4
So 52109-89-4 is a valid CAS Registry Number.

52109-89-4Downstream Products

52109-89-4Relevant articles and documents

Efficient and Mild Ullmann-Type N-Arylation of Amides, Carbamates, and Azoles in Water

Bollenbach, Maud,Aquino, Pedro G. V.,de Araújo-Júnior, Jo?o Xavier,Bourguignon, Jean-Jacques,Bihel, Frédéric,Salomé, Christophe,Wagner, Patrick,Schmitt, Martine

supporting information, p. 13676 - 13683 (2017/10/10)

A simple, sustainable, efficient, mild, and low-cost protocol was developed for d-glucose-assisted Cu-catalyzed Ullmann reactions in water for amides, carbamates, and nitrogen-containing heterocycles. The reaction was compatible with diverse aryl/heteroaryl iodides, giving highly substituted pyridine, indole, or indazole rings. This method offers an attractive alternative to existing protocols, because the reaction proceeds in aqueous media, occurs at or near ambient temperature, and provides the N-arylated products in good to high yields.

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