反应详情

5 ml of trichlorosilane are added while stirring to a solution of 0.1 g of H2PtCl6 in 20 ml of dry tetrahydrofuran. A solution of 14.8 g of 2-methoxy-4-[(E)2-methoxycarbonylvinyl]phenyl 4-(3-butenyloxy)benzoate dissolved in 20 ml of dry tetrahydrofuran is cautiously added dropwise thereto. Thereafter, the mixture is stirred at room temperature for 5 hrs. and then at 50° C. for 16 hrs. The reaction mixture is concentrated in a water-jet vacuum and completely freed from residual solvent and trichlorosilane on an oil pump with a cooling trap under reduced pressure. This gives crude 2-methoxy-4-[(E)2-methoxycarbonylvinyl]phenyl 4-(4-trichlorosilanylbutyloxy)benzoate, which is dissolved in dry tetrahydrofuran for storage.

1. additionis cautiously added dropwise
2. waitand then at 50° C. for 16 hrs
3. concentrationThe reaction mixture is concentrated in a water-jet vacuum
4. customcompletely freed from residual solvent and trichlorosilane on an oil pump with a cooling trap under reduced pressure