Reacción #64374

Ecuación de reacción

water

p-Tolylmagnesium bromide

trimethyltin chloride

ammonium chloride

→

p-tolyltrimethyltin

Disolventes

tetrahydrofuran

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.DISSOLUTIONto dissolve the precipitate
2. 2
   ExtracciónThe solution was extracted three times with diethyl ether-hexane (1:1)
3. 3
   LavadoThe combined organic phase was washed with brine
4. 4
   Secadodried (magnesium sulfate)
5. 5
   Otrothe solvents removed in vacuo
6. 6
   workup.DISTILLATIONVacuum distillation of the residue
7. 7
   Otroafforded a colorless liquid (39°-40 ° C., 0.1 mm Hg) which
8. 8
   Otrowas further purified by flash chromatography (silica gel, hexane)

Procedimiento

p-Tolylmagnesium bromide solution (Aldrich) (1.0M solution in diethyl ether) (53 ml, 0.0530 mol) was added dropwise to trimethyltin chloride (6.92 g, 0.0347 mol) in tetrahydrofuran (50 ml) under nitrogen at -10° C. The suspension was allowed to warm slowly to room temperature over 3 h then saturated ammonium chloride solution (10 ml) was added followed by sufficient water to dissolve the precipitate. The solution was extracted three times with diethyl ether-hexane (1:1). The combined organic phase was washed with brine, dried (magnesium sulfate) and the solvents removed in vacuo. Vacuum distillation of the residue afforded a colorless liquid (39°-40 ° C., 0.1 mm Hg) which was further purified by flash chromatography (silica gel, hexane) to give p-tolyltrimethyltin as a colorless liquid.

Fuente