Reaction #1435701

Reaction equation

piperidine

2-(2-tert-butyl-6-methyl-pyran-4-ylidene)-malononitrile

5-(4-diphenylamino-phenyl)-thiophene-2-carbaldehyde

→

target compound

Yield 50.0%

2-(2-tert-butyl-6-{2-[5-(4-diphenylamino-phenyl)-thiophene-2-yl]-vinyl}-pyran-4-ylidene)-malononitrile

Yield 50.0%

Solvents

ethanol

Conditions

Workup

1. 1
   workup.ADDITIONwas added
2. 2
   TemperatureThe reaction solution was heated for 24 hours
3. 3
   Temperaturewhile refluxing
4. 4
   TemperatureAfter cooling the reaction solution
5. 5
   Filtrationthe precipitated red solid was filtered
6. 6
   Otherrecrystallized with ethanol

Procedure

As shown in the following reaction 3, 0.72 g (3.37 mmol) of (2-(2-tert-butyl-6-methyl-pyran-4-ylidene)-malononitrile and 1 g (2.81 mmol) of 5-(4-diphenylamino-phenyl)-thiophene-2-carbaldehyde were added into 50 ml of ethanol, and 0.28 g (3.37 mmol) of piperidine was added thereto. The reaction solution was heated for 24 hours while refluxing. After cooling the reaction solution, the precipitated red solid was filtered, and recrystallized with ethanol to obtain 0.79 g of the target compound (Yield 50%).

Source