Cyclopentadiene → Methoxydimethylsilylcyclopentadiene

Temperature

0 °C

16.8 ml (0.22 moles) of a suspension of sodium in toluene at 30% are charged into a 250 ml flask. The mixture is diluted with 100 ml of THF and cooled to 0° C. 18.5 ml (0.22 moles) of cyclopentadiene diluted in 50 ml of THF are slowly added dropwise (about 60 minutes). The resulting solution is left under stirring at room temperature for a whole night, is then cooled to 0° C. and 29 ml (0.22 moles) of methoxydimethylchlorosilane fresh distillate (PETRARCH: 90%) are slowly added dropwise. The reaction is carried out at 0° C. for 3 hours. After filtration of the salt formed and evaporation of the solvent, a dark yellow oily liquid is obtained which, on distillation at 160°-162° C. gives 7.5 g of the desired product with a purity of 95.5% (GC), and a yield of 24%.

1. additionare slowly added dropwise (about 60 minutes)
2. waitThe resulting solution is left
3. temperatureis then cooled to 0° C.
4. filtrationAfter filtration of the salt
5. customformed
6. customevaporation of the solvent
7. customa dark yellow oily liquid is obtained which
8. distillationon distillation at 160°-162° C.

ORD record

ord-975e56723ee748a6a679d1798a13d398

Source dataset

uspto-grants-1998_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05846895