Reaction of Baylis-Hillman Adducts with Fluorinated Silanes
作者:Artem A. Zemtsov、Vitalij V. Levin、Alexander D. Dilman、Marina I. Struchkova、Pavel A. Belyakov、Vladimir A. Tartakovsky、Jinbo Hu
DOI:10.1002/ejoc.201001051
日期:2010.12
Reactions of acylated Baylis–Hillmanadducts bearing nitrile, ester, or ketone groups with C6F5-substituted silicon reagents MenSi(C6F5)4–n (n = 1–3) have been studied. The reactions are initiated by Bu4NOAc (5 mol-%) in MeCN or DMF under mild conditions and afford products of allylic substitution of the acetoxy group by the C6F5 carbanion in good yields. Predominant or exclusive formation of one geometrical
Synthesis of Aromatic Sulfones from SO<sub>2</sub>
and Organosilanes Under Metal-free Conditions
作者:Niklas von Wolff、Joëlle Char、Xavier Frogneux、Thibault Cantat
DOI:10.1002/anie.201702311
日期:2017.5.8
The conversion of SO2 into arylsulfones undermetal‐freeconditions was achieved for the first time by reacting SO2 with (hetero)arylsilanes and alkylhalides in the presence of a fluoride source. The mechanism of this transformation was elucidated based on DFT calculations, which highlight the influence of SO2 in promoting C−Si bond cleavage.
1-halosilatranes is discussed. Some new preparative methods based on hetero- and homo-lytic reactions of the silatrane and the Si- and C-substituted silatranes with halogenating reagents are described and also synthetic routes to 1-halosilatranes from certain organotrialkoxy- and organotrichlorosilanes. The electrophilic reactions of 1-iodosilatrane with ethers and esters, carbonylcompounds, alkoxysilanes and siloxanes
fluoride that serves as a base as well as an essential activator enabled a copper‐catalyzed C–N‐bond‐forming reaction between simple alkoxyarylsilanes and N‐benzoyloxyamines. This method allows the amination of simple arylsilanes bearing two or three alkoxy groups on the silicon atom.
Methods and compounds for making coatings, waveguides and other optical devices
申请人:——
公开号:US20030162985A1
公开(公告)日:2003-08-28
A compound of the general formula R
1
R
2
MR
4
R
5
is disclosed wherein R
1
and R
2
are independently an aryl, alkyl, alkenyl, epoxy or alkynyl group, wherein at least one of R
1
and R
2
is fully or partially fluorinated, wherein M is selected from group 14 of the periodic table, wherein R
4
and R
5
are independently an alkoxy group, OR
3
, or a halogen group, X, except where M is Si, R
4
and R
5
are both ethoxy groups or both chlorine groups, and R
1
and R
2
are perfluorinated groups. This compound formed can be further reacted to attach an additional organic R group, and/or hydrolyzed, alone or with one or more similar compounds, to form a material having a molecular weight of from 500 to 10,000, which material can be deposited on various substrates as a coating or deposited and patterned for a waveguide or other optical device components. Methods for making compounds of the general formula R
1
MR
4
R
5
R
6
are also disclosed.