controlled manner. Thus allylation of trisubstituted chlorosilanes (R3SiCl) afforded a variety of aryl, aralkyl, and alkenyl substituted allylsilanes. Dichlorosilanes (R2SiCl2) can either afford monoallylated silanes or diallylated silanes depending on the amount of allylsamarium bromide used. Similarly, trichlorosilanes (RSiCl3) can selectively afford mono-, di-, and tri-allylation products. Finally
Selective mono- and di-allylation and allenylation of chlorosilanes using indium
作者:Zhifang Li、Chenjun Yang、Hongfang Zheng、Huayu Qiu、Guoqiao Lai
DOI:10.1016/j.jorganchem.2008.08.028
日期:2008.12
Allyl and allenyl groups have been introduced into silicon systems by the allylation and allenylation of chlorosilanes using allylbromide or propargyl bromide with indium. The allylation of chlorosilanes afforded a variety of aryl, aralkyl, and alkenyl substituted allylsilanes. By applying this method, the reactions of 1-bromo-3-methylbut-2-ene, 3-bromo-2-methylprop-1-ene and 3-bromobut-1-ene with
作者:Sophie Boldon、Jane E. Moore、Véronique Gouverneur
DOI:10.1016/j.jfluchem.2009.05.017
日期:2009.12
fluorous silylated bicyclononane, prepared from the titanium-mediated annulation of 1-acetylcyclohexene and a fluorous-tagged allylsilane, was successfully detagged under Fleming-type oxidation conditions. The stereochemistry of the resulting hydroxylated product indicates retention of configuration upon detagging in line with the non-fluorous variant of this transformation.
silanes, stereogenic at silicon, are rather limited. While catalytic asymmetric desymmetrization reactions of symmetric organosilicon compounds have been developed, the utilization of racemic silanes in a dynamic kinetic asymmetric transformation (DYKAT) or dynamic kinetic resolution (DKR) would significantly expand the breadth of accessible Si-stereogenic compounds. We now report a DYKAT of racemic allyl
On the synthesis of siloxanes. XXIV. Nucleophilic substitution reactions of 2-functional 1,3-dioxa-2-4,7-trisilacylcloheptanes and 1,3-dioxa-2,4,8-trisilacyclooctanes