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1220972-77-9

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1220972-77-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1220972-77-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,2,0,9,7 and 2 respectively; the second part has 2 digits, 7 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1220972-77:
(9*1)+(8*2)+(7*2)+(6*0)+(5*9)+(4*7)+(3*2)+(2*7)+(1*7)=139
139 % 10 = 9
So 1220972-77-9 is a valid CAS Registry Number.

1220972-77-9Downstream Products

1220972-77-9Relevant articles and documents

Palladium-catalysed direct arylation of heteroaromatics bearing unprotected hydroxyalkyl functions using aryl bromides

Roger, Julien,Pozgan, Franc,Doucet, Henri

experimental part, p. 696 - 710 (2010/06/19)

Heteroaromatics bearing unprotected hydroxyalkyl functions can be arylated using aryl or heteroaryl bromides, via palladium-catalysed carbonhydrogen bond activation/arylation. Good yields were generally obtained using 0.01-0.5 mol% of the air-stable palladium acetate complex as the catalyst. The nature of the base was found to be crucial for the selectivity of this reaction. Potassium acetate led to the direct arylation products whereas caesium car-bonate led to the formation of the ether. This procedure is certainly more atom-economic than other methods for the preparation of such compounds, as no protection/ deprotection sequence of the hydroxyalkyl function and no preparation of an organometallic derivative is required.

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