Reaction #172428

Reaction equation

5-[2-(2-benzyloxy-4-dibutylaminophenyl)vinyl]thiophene-2-carboaldehyde

2-(3-cyano-4,5-dimethyl-5-trifluoromethyl-2(5H)-furanylidene)propanedinitrile

→

dark reddish brown crystal

Yield 94.0%

2-[4-[2-[5-[2-(2-benzyloxy-4-dibutylaminophenyl)vinyl]thiophene-2-yl]vinyl]-3-cyano-5-methyl-5-trifluoromethyl-2(5H)-furanylidene]propanedinitrile

Yield 94.0%

Solvents

ethanol

tetrahydrofuran

Conditions

Workup

1. 1
   workup.STIRRINGfurther stirred
2. 2
   Temperaturewith heating at 50° C. for 6 hours
3. 3
   OtherThe solvent was evaporated off
4. 4
   Washthe residue was washed with ethanol

Procedure

In 10 ml of ethanol and 2 ml of tetrahydrofuran were dissolved 730 mg (1.63 mmol) of 5-[2-(2-benzyloxy-4-dibutylaminophenyl)vinyl]thiophene-2-carboaldehyde and 380 mg (1.5 mmol) of 2-(3-cyano-4,5-dimethyl-5-trifluoromethyl-2(5H)-furanylidene)propanedinitrile. The mixture was stirred at room temperature for 19 hours and further stirred with heating at 50° C. for 6 hours. The solvent was evaporated off and the residue was washed with ethanol to give 860 mg of a dark reddish brown crystal (yield: 94.0%; mp: 184-185° C.)

Source