Efficient synthesis of E-1,2-bis(silyl)ethenes via ruthenium-catalyzed homocoupling of vinylsilanes carried out in ionic liquids
作者:Szymon Rogalski、Patrycja Żak、Miłosz Miętkiewski、Michał Dutkiewicz、Ryszard Fiedorow、Hieronim Maciejewski、Cezary Pietraszuk、Marcin Śmiglak、Thomas J.S. Schubert
DOI:10.1016/j.apcata.2012.08.038
日期:2012.11
[RuHCl(CO)(PCy3)2] immobilized in a variety ionic liquids ([bmim][PF6], [bmim][BF4], [bmim][Tf2N], [bmim][TfO], [bmim][HSO4], [bmim][Cl], [trimim][MeSO4], [NBu3Me][MeSO4], [PBu4][Cl], [bpy][PF6], [bpy][BF4], [bpy][Cl]) exhibits high catalytic activity in homocoupling of H2CCHSiMe2Ph, H2CCHSi(OEt)3 and H2CCHSiMe(OSiMe3)2 and enables high-yield stereoselective synthesis of the corresponding E-1,2-bis(silyl)ethenes
一系列钌络合物(RuCl 3 ×3H 2 O,[C 5 H 5 Ru(CH 3 CN)3 ] + [PF 6 ] -,[RuCl 2(PPh 3)3 ],[RuHCl(CO)(PPh)3)3 ],固定在[bmim] [Tf 2 N]中的[RuHCl(CO)(PCy 3)2 ])在乙烯基硅烷(H 2 C CHSi(OEt)3,H 2 C CHSi(O i Pr)3,H 2C CHSi(OSiMe 3)3,H 2 C CHSiMe(OSiMe 3)2和H 2 C CHSiPh(OSiMe 3)2)在双相系统中进行。对于[RuHCl(CO)(PCy 3)2 ] ,观察到最高的催化活性和均偶联产物的选择性。固定在多种离子液体([bmim] [PF 6 ],[bmim] [BF 4 ],[bmim] [Tf 2 N],[bmim] [TfO]中的络合物[RuHCl(CO)(PCy 3)2 ] ],[bmim]