1829-58-9Relevant academic research and scientific papers
Rhodium-Catalyzed Intermolecular Silylation of Csp?H by Silacyclobutanes
He, Tao,Li, Bin,Liu, Lichuan,Ma, Wenpeng,He, Wei
, p. 5648 - 5652 (2021)
The signature reactivity of silacyclobutane (SCB) is their cycloaddition reactions with various π bonds. Recently, the first cases were disclosed where SCBs reacted with both Csp2?H and Csp3?H σ bonds in an intramolecular fashion. Herein, it is reported that SCB is also an efficient reagent for Csp?H bond silylation. Thus, rhodium-catalyzed intermolecular reactions between SCBs and terminal alkynes produced a series of symmetrical and unsymmetrical tetraorganosilicons bearing a Csp?Si functionality. Preliminary studies suggested that the reaction did not involve a cycloaddition pathway, but instead a direct activation of Csp?H bonds.
Acceleration of the substitution of silanes with Grignard reagents by using either LiCl or YCl3/MeLi
Hirone, Naoki,Sanjiki, Hiroaki,Tanaka, Ryoichi,Hata, Takeshi,Urabe, Hirokazu
supporting information; experimental part, p. 7762 - 7764 (2010/12/25)
Getting up to speed: Both LiCl and the YCl3/MeLi catalyst system have an acceleration effect upon the substitution of silanes using Grignard reagents (see scheme). The method provides access to benzyl-, allyl-, and arylsilanes in good yields from the starting silanes.
Selective mono- and di-allylation and allenylation of chlorosilanes using indium
Li, Zhifang,Yang, Chenjun,Zheng, Hongfang,Qiu, Huayu,Lai, Guoqiao
scheme or table, p. 3771 - 3779 (2009/02/08)
Allyl and allenyl groups have been introduced into silicon systems by the allylation and allenylation of chlorosilanes using allyl bromide 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 chlorosilanes also proceed smoothly to give regioselectively allylic rearrangement products in good yields. Mediated by indium, dichlorosilanes (R2SiCl2) and trichlorosilanes (RSiCl3) can either afford monoallylated silanes or diallylated silanes depending on the amount of allyl bromide and indium used.
Controlled introduction of allylic group to chlorosilanes
Li, Zhifang,Cao, Xiaojun,Lai, Guoqiao,Liu, Jinhua,Ni, Yong,Wu, Jirong,Qiu, Huayu
, p. 4740 - 4746 (2007/10/03)
Allylation of chlorosilanes has been achieved with allylsamarium bromide, especially in a 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, perchlorosilane (SiCl4) was allylated stepwise and the corresponding silanes containing one, two, three or four allylic groups, respectively, were obtained in satisfactory yields.
Ene cyclisations of α-(prenyl)dialkylsilyloxy aldehydes: Formation and oxidative cleavage of oxasilacyclohexanols
Robertson, Jeremy,Hall, Michael J.,Stafford, Petra M.,Green, Stuart P.
, p. 3758 - 3767 (2007/10/03)
A variety of routes are described for the synthesis of α-silyloxy aldehydes in which the silicon atom bears a prenyl side chain. These compounds are shown to undergo stereoselective carbonyl ene cyclisation under mildly Lewis acidic conditions and the der
Unimolecular chain transfer (UMCT) reactions: concepts, preliminary results with silicon hydrides, and future potential
Curran, Dennis P.,Xu, Jinyou,Lazzarini, Edoardo
, p. 3049 - 3060 (2007/10/03)
Most radical reactions are conducted by chain methods that have bimolecular chain transfer steps.It is proposed that unimolecular chain transfer (UMCT) reactions should have advantages for conducting difficult radical transformations.The concepts of the U
