Synthesis of Bis(trimethylsilyl) Ketone and Reactions with Organometallic Compounds.
摘要:
Bis(trimethylsilyl) ketone (1) has been prepared by hydrolysis of the cr-chloro ether 3a on silica gel. Reaction of ketone 1 with organoaluminium, organomagnesium and organolithium compounds gave addition products and/or bis(trimethylsilyl)methanol(5).
作者:Mendoza-Espinosa, Daniel、Rendón-Nava, David、Vásquez-Pérez, Jose M.、Sandoval-Chávez, Cesar I.、Alvarez-Hernández, Alejandro
DOI:10.1021/acs.organomet.0c00517
日期:——
of complexes 4a–d featuring a [Rh(CO)2I] fragment used for the detemination of the donor properties of the new triazolylidene ligands. All complexes have been fully characterized by means of 1H and 13C NMR spectroscopy, melting point, elemental analysis, and in the case of complex 3a, by X-ray crystallography. Comparison of the catalytic activity of the new rhodium complexes in C–C and C–Si bond forming
Synthetically useful 1,1-dibromo-2-arylethenes were readily prepared in good yields via double bromodesilylation of the easily accessible 1,1-bis(trimethylsilyl)-2-arylethenes using N-bromosuccinimide under mild conditions.
route to 1,1-bis(silyl)-1-alkenes has been developed. Sequential one-pot silylative coupling exo-cyclization of 1,2-bis(dimethylvinylsiloxy)ethane followed by the reaction with Grignard reagents leads to the desired 1,1-bis(silyl)ethenes, which are then efficiently coupled in the presence of silver nitrate and palladium acetate with aryl or alkenyl idodides to give the corresponding 1,1-bis(silyl)-2-arylethenes
The reactions of tris(trimethylsilyl)methyl-lithium with some carbon electrophiles
作者:Ian Fleming、Christopher D. Floyd
DOI:10.1039/p19810000969
日期:——
non-enolisable aldehydes, ketones, and acid chlorides, and with some epoxides, with the formation of carbon–carbon bonds. This method of preparing functionalized silanes is limited by the readiness with which (1) abstracts a proton, if one is available, rather than attacks at carbon. In the reaction with epoxides, the product alkoxide can transfer a silyl group from carbon to oxygen, and in one case the
Symmetrical 1,1-bis(silyl)ethenes have been easily prepared via ruthenium complex-catalyzed silylative coupling cyclization of 1,2-bis(dimethylvinylsiloxy)ethane to give 2,2,4,4-tetramethyl-3-methylene-1,5-dioxa-2,4-disilacycloheptane with excellent selectivity and good yield, followed by its reaction with Grignard reagents. The cyclic product can also be effectively transformed into cyclic carbosiloxane