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5-bromo-2-(4-fluorophenyl)-7-(trifluoromethyl)quinoxaline is a chemical with a specific purpose. Lookchem provides you with multiple data and supplier information of this chemical.

219540-15-5

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219540-15-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 219540-15-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,1,9,5,4 and 0 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 219540-15:
(8*2)+(7*1)+(6*9)+(5*5)+(4*4)+(3*0)+(2*1)+(1*5)=125
125 % 10 = 5
So 219540-15-5 is a valid CAS Registry Number.

219540-15-5Downstream Products

219540-15-5Relevant academic research and scientific papers

Safe and reliable synthesis of diazoketones and quinoxalines in a continuous flow reactor

Martin, Laetitia J.,Marzinzik, Andreas L.,Ley, Steven V.,Baxendale, Ian R.

, p. 320 - 323 (2011/03/23)

A flow method for the synthesis of aliphatic and aromatic diazoketones from acyl chloride precursors has been developed and used to prepare quinoxalines in a multistep sequence without isolation of the potentially explosive diazoketone. The protocol showcases an efficient in-line purification using supported scavengers with time-saving and safety benefits and in particular a reduction in the operator's exposure to carcinogenic phenylenediamines.

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