对于他们的α烯烃的聚合中的潜在用途,具有侧仲酰胺ñ -叔- butyoxydimethylsilyl基团以及它们的一些锆络合物的合成。用LiL tBu处理顺式-ZrCl 4(THF)2,其中L tBu是混合的N,O-供体配体Me 2 Si(O t Bu)(NH t Bu)的阴离子,得到顺式-(L tBu)2氯化锆2。单晶X射线分析显示伪八面体锆中心具有两个氯化物和两个螯合的N,O配体。用对甲苯胺或对茴香胺取代叔丁胺可提供空间较小的Me 2 Si(O t Bu)(NH- p -C 6 H 4 Me)= HL pTol和Me 2 Si(O t Bu)(NH - p -C 6 H ^ 4 OME)= HL潘尼斯,分别。顺式-ZrCl 4(THF)的反应2与两个当量的LiL pTol或LiL pAnis始终不变地分别仅给出三酰氨基-一氯代配合物(L pTol)3 ZrCl和(L pAnis)3 Z
SYNTHESIS AND HYDROLYTIC STABILITY OF<i>TERT</i>-BUTOXYDIMETHYLSILYL ENOL ETHERS
作者:Zacharia A. Fataftah、Abdel-Monem M. Rawashdeh、Chariklia Sotiriou-Leventis
DOI:10.1081/scc-100104840
日期:2001.1
tert-Butoxydimethylsilyl enolethers derived from aldehydes and ketones were synthesized in good yields with high regioand stereoselectivities, under thermodynamically and kinetically controlled conditions. The hydrolytic stability of tert-butoxydimethylsilyl enolether of cyclohexanone was studied under acidic and basic conditions and compared to that of trimethylsilyl, tert-butyldimethylsilyl and
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
Stereocontrolled synthesis of α-glucosides by intramolecular glycosidation
作者:Mikael Bols
DOI:10.1039/c39920000913
日期:——
α-Glucosides are prepared by connecting phenylthio 3,4,6-tri-O-acetyl-α-D-glucopyranoside and an alcohol or a phenol with a dimethylsilylene bridge followed by iodonium ion catalysed intramolecular glycosidation.