Synthesis and Reactions of Silicon Analogs of Lithium Ester Enolates.

Accession number;99A0308698
Title;Synthesis and Reactions of Silicon Analogs of Lithium Ester Enolates.
Author; OHSHITA J (Hiroshima Univ., Higashi-hiroshima) SAKURAI H (Hiroshima Univ., Higashi-hiroshima) TOKUNAGA Y (Hiroshima Univ., Higashi-hiroshima) KUNAI A (Hiroshima Univ., Higashi-hiroshima)
Journal Title;Abstr Symp Organomet Chem Jpn
Journal Code:L0853A
ISSN:
VOL.45th;NO.;PAGE.10-11(1998)
Figure&Table&Reference;
Pub. Country;Japan
Language;English
Abstract;Reactions of (Me3Si)3SiCO2R(1a, R=Cy; 1b, R=Ad) with (Me3Si)3SiLi gave silicon analogs of lithium ester enolates(3a,b). Treatment of 3a, 3b with Et3SiCl, MeI, and H2O gave the corresponding polysilane carboxylates in which a silyl, methyl, or H-Si group is introduced on the central silicon atom. Oxidative coupling of 3a, b with PdCl2 afforded 1,2-bis(alkoxycarbonyl)-tetrakis(trimethylsilyl)disilanes(8a, b). Treatment of 3a, b with mesityl aldehyde then with Et3SiCl, t-BuMe2SiCl, or MeI, afforded products derived from the reaction of the lithium ester enolate, mesityl aldehyde, and Et3SiCl, t-BuMe2SiCl, or MeI in a ratio of 1:1:1. (author abst.)