Reaction #1340566

Reaction equation

phenylglyoxal

9,10-diaminophenanthrene

→

dibenzo[f,h]quinoxaline

Yield 92.0%

2-Phenyldibenzo[f,h]quinoxaline

Yield 92.0%

Solvents

ethanol

Conditions

Workup

1. 1
   TemperatureThe solution was refluxed for 7 hours
2. 2
   Otherto be reacted
3. 3
   OtherThe white power precipitated through the reaction
4. 4
   Filtrationwas filtered
5. 5
   WashThe residue was washed with ethanol

Procedure

First, 2.16 g of phenylglyoxal and 3.36 g of 9,10-diaminophenanthrene were dissolved in a solvent of 100 mL of dehydrated ethanol under a nitrogen atmosphere. The solution was refluxed for 7 hours to be reacted. The white power precipitated through the reaction was filtered. The residue was washed with ethanol and then ether to give a dibenzo[f,h]quinoxaline derivative, Hdbq-P, which was the target substance (yield: 92%). Synthesis scheme of Step 1 is shown in (a-1) below.

Source