Nucleophile-Induced Ring Enlargement of 1-(1-Iodoalkyl)silacyclobutane and 1-(1,2-Epoxyalkyl)silacyclobutane into Silacyclopentane. Application to the Syntheses of 1,4-Diol, 4-Alken-1-ol, and 1,4,5-Triol
Treatment of 1-(1-iodoalkyl)-1-silacyclobutanes with t-BuOK or AgOAc provided 2-alkyl-1-silacyclopentanes which were easily converted into 1,4-diols by oxidative cleavage of carbonsilicon bonds.
Chemistry of Enoxysilacyclobutanes: Highly Selective Uncatalyzed Aldol Additions
作者:Scott E. Denmark、Brian D. Griedel、Diane M. Coe、Mark E. Schnute
DOI:10.1021/ja00095a004
日期:1994.8
O(Silacyclobuty1) ketene acetals derived from esters, thiol esters, and amides underwent facile aldol addition with a variety of aldehydes at room temperature without the need for catalysts. The uncatalyzed aldol addition reaction of O(silacyclobuty1) ketene acetals displayed the following characteristics: (1) the rate of reaction was highly dependent on the spectator substituent on silicon and the
Monosilacyclobutanes of the type RR′2CH2CH2 are prepared by ring closure reactions of 3-halopropylhalosilanes and by substitution of SiCl containing silacyclobutane rings with organometallic reagents (RMgX, LiR, NaCp). Under optimal experimental conditions yields between 50 and 95% can be obtained by both procedures. Characterization of the compounds is accomplished by analytical (C, H, N) and NMR
Synthesis and polymerization of 9-carbazolyl-containing 1-silacyclobutane derivatives
作者:N. V. Ushakov、N. A. Pritula、A. I. Rebrov
DOI:10.1007/bf00699934
日期:1993.8
9-carbazolyl-containing 1-silacyclobutane derivativescontainingtri-, tetra-, and pentamethylenebridges between the nitrogen and silicon atoms and 1-methyl-1-p-[dimethyl-γ-(9-carbazolylpropyl)silyl]phenyl-1-silacyclobutane have been synthesized. Polymerization (thermally induced and catalytic) of these monomers afforded polysiltrimethylenes having 9-carbazolyl groups in the substituents framing the main