781640-95-7

Upstream product

• 73183-34-3 bis(pinacol)diborane 
• 185910-18-3 1,2-bis(2,4,6-tris[bis(trimethylsilyl)methyl]phenyl)-1,2-bis(2,4,6-trimethylphenyl)-disilene 
• 67975-91-1 2-chloro-4,4,5,5,-tetramethyl-1,3,2-dioxaboralane 
• 3282-30-2 pivaloyl chloride 
• 796870-05-8 (mesityl)(2,4,6-tris[bis(trimethylsilyl)methyl]phenyl)Si(B(pinacolato))2 

Downstream Products

• 1013399-77-3 H₂Si(C₆H₂(CH₃)3)(C₆H₂(CH(Si(CH₃)3)2)2C(Si(CH₃)3)2BOC(CH₃)2C(CH₃)2O) 

Relevant academic research and scientific papers

Synthesis of alkali metal salts of borylsilyl anions utilizing highly crowded silylboranes and their properties

The lithium salt of a borylsilyl anion, [Tbt(Mes)SiBpin]-Li + (11: Tbt = 2,4,6-tris[bis(trimethylsilyl)-methyl]phenyl, Mes = mesityl, pin = pinacolato), was synthesized by the boron-metal exchange reaction of a diborylsilane, Tbt(Mes)Si(Bpin)2 (8), which was synthesized by the insertion of a highly crowded diarylsilylene, Tbt(Mes)Si: (1), into the B-B bond of a diborane(4) compound, B2pin2. Although a salt of the borylsilyl anion 11 could not be isolated due to its thermal instability, the investigation of the reactivity of the anion revealed that 11 is a possible precursor for Si-functionalized silylboranes as well as Si,Si-difunctionalized silanes. Furthermore, the borylsilyl anion [Tbt(Mes)SiBScat]- (27: Scat = dithiocatecholato), which was synthesized by a procedure similar to that used for 11, showed a reactivity different from that of 11. Theoretical calculations for the borylsilyl anions revealed that the anion 27 has a boratasilene character; namely, the Si-B bond has a double-bond character due to the donation of an electron pair of the negatively charged silicon atom into the vacant p-orbital of the adjacent boron atom.

Insertion of an overcrowded silylene into hydro- and haloboranes: A novel synthesis of silylborane derivatives and their properties

Reactions of stable silylene-isocyanide complexes Tbt(Mes)SiCNAr (3a, Ar = Mes*; 3b, Ar = Tbt; 3c, Ar = Tip; Tbt = 2,4,6-tris[bis(trimethylsilyl) methyl]phenyl, Mes = mesityl, Mes* = 2,4,6-tri-tert-butylphenyl, Tip = 2,4,6-triisopropylphenyl) with boron compounds were investigated. Reactions of 3a,b with BH3·THF afforded the first stable silylborane-isocyanide complexes, Tbt(Mes)SiHBH2·CNAr (4a,b). Silylene complex 3a reacted with BH3·PPh3 as well to give the corresponding silylborane-phosphine complex Tbt(Mes)SiHBH 2·PPh3 (12). In addition, silylene 2 thermally generated from the corresponding disilene, Tbt(Mes)Si= Si(Mes)Tbt (1), gave 12 when reacted with BH3·PPh3. These results strongly suggested that the reactions of 3 with BH3·THF and BH 3·PPh3 proceeded via insertion of a silylene, Tbt-(Mes)Si: (2), into the B-H bond rather than the nucleophilic attack of the silicon atom of 3 toward the boron atom. Thermal dissociation of 4 and 12 into a base-free silylborane, Tbt(Mes)SiHBH2 (9), was evidenced by the base-exchange reactions. Furthermore, silylene 2 was found to insert into boron-halogen bonds as well as boron-hydrogen bonds. The novel reactivity of silylene 2 was applied to the syntheses of a variety of silylborane derivatives such as base-free silylboranes, silylborane-isocyanide complexes, and silylborates.