Convenient Route to Di- and Triorganosilyl Ethyl Ethers and the Corresponding Di- and Triorganosilanes.

摘要

Tetraethoxysilane was treated with alkyl- and aryllithium reagents for the preparation of organosilyl ethyl ethers of the type R3SiOEt, R2R'SiOEt, and R2Si(OEt)2, that can be reduced to the organosilanes R3-SiH, R2R'SiH, and R2SiH2, respectively. Compounds of the type RR'R 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, R2R'SiH, and R2SiH2 compounds without hydrolysis of the Si-H moiety that often occurs in standard aqueous work-up procedures of unhindered silanes.