Tributyltin Chloride → 4-(4-Chloro-phenyl)-6-methyl-2-(4-tributylstannanyl-imidazol-1-yl)-pyrimidine

Temperatur

0 °C

To a stirred solution of 4-(4-chloro-phenyl)-2-(4-iodo-imidazol-1-yl)-6-methyl-pyrimidine (Example E.69) (0.40 g, 1.0 mmol) in THF (7 mL) was added at 0° C. isopropyl-magnesium chloride lithium chloride (1M in THF, 1.22 mL, 1.22 mmol). The reaction mixture was allowed to stir for 15 min at 0° C., tributyltin chloride (0.43 g, 1.33 mmol) was added, the reaction mixture was stirred at room temperature for 5 h, poured into saturated ammonium chloride solution (30 mL) and extracted with ethyl acetate (2×50 mL). The combined organic layers were washed with brine (30 mL), dried (MgSO4) and evaporated. The crude product was further purified by flash chromatography on silica gel (ethylacetate/heptane) to yield the title compound (0.47 g, 84%) as a light yellow oil. MS (ISP) 561.2 [(M+H)+].

1. customwas added at 0° C.
2. stirringthe reaction mixture was stirred at room temperature for 5 h
3. extractionextracted with ethyl acetate (2×50 mL)
4. washThe combined organic layers were washed with brine (30 mL)
5. dry with materialdried (MgSO4)
6. customevaporated
7. customThe crude product was further purified by flash chromatography on silica gel (ethylacetate/heptane)

ORD-Eintrag

ord-5423a291ec4440ff9c7dc658de0db46c

Quelldatensatz

uspto-grants-2012_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08183262B2