Reacción #1726677

Ecuación de reacción

hydrogen

1,10-phenanthroline

pyridine water

trifluoroacetic acid

2-trifluoromethylthiophenol

sodium hydride

hydrogen

→

1-[2-(2-Trifluoromethylphenylsulfanyl)phenyl]piperazine

Disolventes

dichlormethane

tetrahydrofuran dimethylformamide

Condiciones de reacción

Tratamiento posterior

1. 1
   TemperaturaAfter cooling to room temperature
2. 2
   Filtraciónthe resin was filtered off
3. 3
   Lavadowashed with tetrahydrofuran (2×50 mL), tetrahydrofuran/water (1:1) (2×50 mL), N,N-dimethylformamide (2×50 mL), water (2×50 mL), methanol (3×50 mL), tetrahydrofuran (3×50 mL)
4. 4
   LavadoFinally, the resin was washed with dichloromethane (3×50 mL)
5. 5
   Otrodried in vacuo (25° C., 12 h)
6. 6
   Otroto yield a dark orange resin
7. 7
   Otrowas placed in light-transparent reactor tube
8. 8
   workup.STIRRINGThe suspension was agitated by rotation under irradiation with visible light for 12 h
9. 9
   FiltraciónThe resin was filtered
10. 10
    Lavadowashed with methanol (2×25 mL), water (2×25 mL) and tetrahydrofuran (3×25 mL) until the washing solutions
11. 11
    Otrothe irradiation procedure
12. 12
    Lavadothe resin was washed with dichlormethane (3×25 mL)
13. 13
    Otrodried in vacuo (25° C., 12 h)
14. 14
    Otroto obtain a light brown resin
15. 15
    workup.STIRRINGstirred at room temperature for 2 h
16. 16
    FiltraciónThe resin was filtered off
17. 17
    Lavadowashed with methanol (1×0.5 mL) and dichloromethane (1×0.5 mL)
18. 18
    OtroThe filtrates were collected
19. 19
    Otrothe volatile solvents evaporated in vacuo
20. 20
    OtroThe crude product was purified by preparative LC-MS and subsequently by ion-exchange chromatography
21. 21
    OtroRT=2.39

Procedimiento

To a solution of 2-trifluoromethylthiophenol (1.75 g, 9.8 mmol) in a 1:1 mixture of tetrahydrofuran/dimethylformamide (30 mL), sodium hydride (7.4 mmol, 60% in mineral oil) was carefully added at room temperature (Caution: Generation of hydrogen). The mixture was stirred for an additional 30 min after the generation of hydrogen had ceased. Subsequently, 4-({4-[η6-(2-chloro-phenyl)-η5-cyclopentadienyliron(II)]piperazin-1-yl}carbonyloxymethyl)phenoxymethyl polystyrene hexafluorophosphate (3.5 g, 2.45 mmol) was added and the mixture was stirred at 55° C. for 12 h. After cooling to room temperature, the resin was filtered off and washed with tetrahydrofuran (2×50 mL), tetrahydrofuran/water (1:1) (2×50 mL), N,N-dimethylformamide (2×50 mL), water (2×50 mL), methanol (3×50 mL), tetrahydrofuran (3×50 mL), and subsequently with methanol and tetrahydrofuran (each 50 mL, 5 cycles). Finally, the resin was washed with dichloromethane (3×50 mL) and dried in vacuo (25° C., 12 h) to yield a dark orange resin. The thus obtained resin and a 0.5 M solution of 1,10-phenanthroline in 3:1 mixture of pyridine/water (20 mL) was placed in light-transparent reactor tube. The suspension was agitated by rotation under irradiation with visible light for 12 h. The resin was filtered and washed with methanol (2×25 mL), water (2×25 mL) and tetrahydrofuran (3×25 mL) until the washing solutions were colourless (approx. 5 cycles) and the irradiation procedure was repeated until decomplexation was complete (approx. 5 cycles). After the decomplexation was completed, the resin was washed with dichlormethane (3×25 mL) and dried in vacuo (25° C., 12 h) to obtain a light brown resin. 100 mg (77 μmol) of the thus obtained resin were suspended in a 1:1 mixture of trifluoroacetic acid and dichlormethane (2 mL) and stirred at room temperature for 2 h. The resin was filtered off and washed with methanol (1×0.5 mL) and dichloromethane (1×0.5 mL). The filtrates were collected and the volatile solvents evaporated in vacuo. The crude product was purified by preparative LC-MS and subsequently by ion-exchange chromatography. LC/MS (m/z) 339 (MH+); RT=2.39; purity (UV, ELSD): 92%, 100%; overall yield: 1 mg (4%).

Fuente