Convenient Route to Di- and Triorganosilyl Ethyl Ethers and the Corresponding Di- and Triorganosilanes
SOUTH CAROLINA UNIV COLUMBIA DEPT OF CHEMISTRY
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Tetraethoxysilane was treated with alkyl- and aryllithium reagents for the preparation of organosilyl ethyl ethers of the type R3SiOEt, R2RSiOEt, and R2SiOEt2, that can be reduced to the organosilanes R3-SiH, R2RSiH, and R2SiH2, respectively. Compounds of the type RRR SiOEt can not be cleanly formed. The reduction procedure involves treatment of the silyl alkoxy ethers with diisobutylaluminum hydride DIBALH and hydrolysis of the remaining alkylaluminum compounds with Na2SO4-10H2O. This hydrolysis procedure provides a convenient method for the isolation of R3SiH, R2RSiH, and R2SiH2 compounds without hydrolysis of the Si-H moiety that often occurs in standard aqueous work-up procedures of unhindered silanes.
- Organic Chemistry
- Physical Chemistry