81906-05-0Relevant articles and documents
A Highly Chemoselective Cobalt Catalyst for the Hydrosilylation of Alkenes using Tertiary Silanes and Hydrosiloxanes
Ibrahim, Abdulrahman D.,Entsminger, Steven W.,Zhu, Lingyang,Fout, Alison R.
, p. 3589 - 3593 (2016/07/06)
The hydrosilylation of alkene substrates bearing additional functionalities is difficult to achieve using earth-abundant catalysts and has not been extensively realized with both earth-abundant transition metals and tertiary silanes or hydrosiloxanes. Reported herein is a well-defined bis(carbene) cobalt(I)-dinitrogen complex for the efficient, catalytic anti-Markovnikov hydrosilylation of terminal alkenes, featuring a broad substrate scope. Alkenes containing hydroxyl, amino, ester, epoxide, ketone, formyl, and nitrile groups are selectively hydrosilylated in this reaction sequence. Multinuclear NMR studies of reactive intermediates gave insights into the mechanism.
Regioselective 1,4-silylcupration of 1,3-dienes - Characterization and electrophilic trapping of the intermediate σ-allyl)copper complex
Liepins, Vilnis,Baeckvall, Jan-E.
, p. 3527 - 3535 (2007/10/03)
Silylcupration reactions of 1,3-dienes with a cyanocuprate reagent PhMe2SiCuCNLi produce a (4-silyl-2-alken-1-yl)-copper complex, which was trapped by electrophiles. The use of allylic phosphates as electrophiles resulted in highly regioselecti
The γ-silicon effect. II. The substituent effect on the solvolysis of 3-(aryldimethylsilyl)-2,2-dimethylpropyl p-bromobenzenesulfonates
Nakashima, Tohru,Fujiyama, Ryoji,Fujio, Mizue,Tsuno, Yuho
, p. 1043 - 1047 (2007/10/03)
Solvolysis rates of 3-(aryldimethylsilyl)-2,2-dimethylpropyl p- bromobenzenesulfonates were determined in 60% (v/v) aqueous ethanol (60E) and 97% (w/w) aqueous 2,2,2-trifluoroethanol (97Tw) at 50°C. The effects of aryl substituents at the silyl atom on these solvolyses were correlated with unexalted σ°parameters, giving the ρ values of -0.87 in 60E and -1.08 in 97Tw. This indicates that there exists a certain extent of positive charge on the γ-silicon atom reflecting the delocalization of incipient carbocationic charge by participation of the Si-Cγ, bond. The size of ρ values can be regarded as the effect of aryl ring on γ-Si via percaudal interaction in the rate-determining step.