Reacción #2467993

Ecuación de reacción

sodium methoxide

sodium sulfide

3-chloro-3-phenylprop-2-enenitrile

chloroacetonitrile

→

solid

Rendimiento 8.0%

3-Amino-5-phenylthiophene-2-carbonitrile

Rendimiento 8.0%

Disolventes

water

methanol

DMF

DMF

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.STIRRINGagain stirred at 60-70° C. for 2 h
2. 2
   workup.STIRRINGstirring
3. 3
   workup.WAITwas continued for 1 h at the same temperature
4. 4
   Otrowas allowed to rt
5. 5
   workup.STIRRINGstirred for 15 min
6. 6
   OtroThe solid separated
7. 7
   Filtraciónwas filtered
8. 8
   Lavadowashed with water
9. 9
   Otrodried
10. 10
    OtroThe solid was recrystallized from hexane-chloroform

Procedimiento

To a suspension of sodium sulfide (0.95 g, 12.23 mmol) in DMF (12.5 mL) was added a solution of 3-chloro-3-phenylprop-2-enenitrile (2 g, 12.23 mmol) in DMF (5 mL) at rt for 5 min and stirred the mixture at 60-70° C. for 2 h. Then chloroacetonitrile (0.77 mL, 12.23 mmol) was added dropwise to the reaction mixture and again stirred at 60-70° C. for 2 h. Then, a solution of sodium methoxide (0.66 g, 12.23 mmol) in methanol (5 mL) was added dropwise and stirring was continued for 1 h at the same temperature. The mixture was allowed to rt and poured into cold water and stirred for 15 min. The solid separated was filtered, washed with water and dried. The solid was recrystallized from hexane-chloroform to give the product as a pale brown color solid (150 mg, 8%), nip 158-160° C. 1H NMR (400 MHz, CDCl3): δ 7.52-7.54 (2H, m), 7.37-7.41 (3H, m), 6.75 (1H, s), 4.48 (2H, s); LC-MS (negative ion mode): m/z 199 (M−H)−.

Fuente