Hydrochloric Acid → Dimethyl(2-pyridyl)(trimethylsilylmethyl)silane

Temperature

-78 °C

After dissolving 151 mg (1.0 mmol) of (2-pyridyl)trimethylsilane in 2 ml of dry diethyl ether, 0.67 ml (1.1 mmol) of a t-butyllithium/pentane solution (the concentration: 1.64 M) was added dropwise at an inner temperature of −78° C., whereby the reaction solution turned orange indicating the formation of [dimethyl(2-pyridyl)silyl]methyllithium. After that, the mixture was continued to be stirred at an inner temperature of −78° C. for 30 minutes, and then 130 mg (1.2 mmol) of chlorotrimethylsilane was added to the mixture, which was subsequently stirred at an inner temperature of −78° C. overnight. To the resulting reaction solution was added 5 ml of 1N hydrochloric acid, and the mixture was separated to the organic and aqueous layers. The organic layer was extracted with four portions of 5 ml of 1N hydrochloric acid. The resulting aqueous layers were combined together, and neutralized by the addition of sodium hydroxide pellets. The neutralized aqueous layer was extracted with three portions of 10 ml of diethyl ether. The resulting organic layers were combined together and dried over magnesium sulfate. The solvent was evaporated to give 208 mg of dimethyl(2-pyridyl)(trimethylsilylmethyl)silane (yield: 93%; NMR purity: 95% or more).

1. additionwas added dropwise at an inner temperature of −78° C., whereby the reaction solution
2. stirringwas subsequently stirred at an inner temperature of −78° C. overnight
3. customTo the resulting reaction solution
4. customthe mixture was separated to the organic and aqueous layers
5. extractionThe organic layer was extracted with four portions of 5 ml of 1N hydrochloric acid
6. additionneutralized by the addition of sodium hydroxide pellets
7. extractionThe neutralized aqueous layer was extracted with three portions of 10 ml of diethyl ether
8. dry with materialdried over magnesium sulfate
9. customThe solvent was evaporated

ORD record

ord-b420fec99ae647bcac846f16b892763a

Source dataset

uspto-grants-2003_03

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06531602B2