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Trimethylsilyl tetrakis borate

Protodesilylation of allyl- or aryl-substituted trialkylsilanes with an acid partner is a cleaner method, producing propene or an aromatic hydrocarbon as a volatile inert byproduct. Although some methods of isolation have been reported, they can usually be prepared in situ in aprotic media and employed without further purification. Methods of preparation of representative organosilicon Lewis acids, la, trimethylsilyl bis(trifluoro-methanesulfone)imide (7) [9], trimethylsilyl perchlorate (6a) [10], iodotrimethylsilane, and trimethylsilyl tetrakis(trifluoromethanesulfonyl)borate [11] are described below. In principle, these analogs are also accessible in a similar manner (Table 1) [2d]. [Pg.356]

Tetrakis((4-trimethylsilyl)phenyl)borate BPSi C36H52BSi4 607.96... [Pg.17]

Silylium ions stabilized by Si-X-Si three-center bonds (X = halogen or hydrogen) have been synthesized by the reaction of the corresponding l-tris(trimethylsilyl)methyl-2,3-bis(trimethylsilyl)-l-silacyclopropene derivative with triethylsilylbenzenium tetrakis(pentaflourophenyl)borate <2004CL530>. [Pg.494]

The general procedure for the synthesis of 9-15 is shown in Scheme 1. Bromobenzene 1 was prepared accotding to Bickelhaupt et al. [3], and the novel bromobenzene 2 was synthesized by the reaction of two equivalents of sodium methane thiolate with one equivalent of 2,6-bis(bromomethyl)bromobenzene. Compounds 1 and 2 were then converted with butyllithium to the corresponding litfaialed species which reacted with one equivalent of either methyidichlorosilane, phenyldichlorosilane or dimethyldichlorosilane to afford the chlorosilanes 3-8. The chlorosilanes were then treated with one equivalent of trimethylsilyl triflate to yield the silyl triflates 9-14. Silyl triflate 10 could also be prepared by the reaction of chlorosilane 4 with one equivalent of triflic add. The silyl tetralds(pentafluorphenyl)borate 15 was synthesized by the reaction of chlorosilane 4 with one equivalent of lithium tetrakis(pentafluorphenyl)borate. Compounds 9-15 are dissodated in dichloromethane solution. [Pg.51]

Barlow et al. reported the synthesis of cationic (T) -cyclopentadienyl)(r -fulvene)ruthenium(ll) salts from ruthenocenylmethanol (57) either by treatment with trimethylsilyl triflate to achieve 58 in 79% yield. Alternatively, the reaction of 57 with tetrafluoroboric acid or with hexafluorophosphoric acid gave the tetrafluoroborate or hexafluorophosphate salts in 59 and 60 in 92% and 52% yield, respectively. Treatment of 59 with sodium tetrakis[3,5-bis(trifluoromethyl)]borate afforded the tetraarylborate salt 61 in 69% yield. [Pg.374]

Allyltin derivatives have been used for preparation of allyl(dialkoxy)boranes, apparently without concomitant rearrangement of the allyl moiety during reaction. Lithium tetrakis(trimethylsilyl)borate has been prepared, using tri-methylsilyl-lithium as reagent. ... [Pg.34]


See other pages where Trimethylsilyl tetrakis borate is mentioned: [Pg.357]    [Pg.503]    [Pg.470]    [Pg.138]   


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