The catalytic reactions of triethyl- and triethoxy-silane with unsaturated sulphides

Iridium-Catalyzed Hydrosilylation of Unactivated Alkenes: Scope and Application to Late-Stage Functionalization

“…3r was prepared as a pale yellow oil from 1a (0.50 mmol, 75.1 mg) and (MeO) 3 SiH (0.75 mmol, 91.6 mg), according to the General Procedure in 68% yield (92.6 mg, l/b > 99:1): 1 H NMR (400 MHz, CDCl 3 ) δ 7.37 −7.34 (m, 2 H), 7.31−7.25 (m, 2 H), 7.21−7.14 (m, 1 H), 3.57 (s, 9 H), 2.97 (t, J = 7.2 Hz, 2 H), 1.83−1.74 (m, 2 H), 0.85−0.81 (m, 2 H); 13 C { 1 H} NMR (100 MHz, CDCl 3 ) δ 136. 6, 129.0, 128.8, 125.7, 50.4, 36.3, 22.5, 8.4; MS (ESI) m/z (relative intensity) 272.1 (12), 121.0 (100) [M] + .…”

“…Herein, we demonstrate our research on the Ir-catalyzed hydrosilylation of unactivated alkenes with excellent anti-Markovnikov regioselectivity and high efficiency, which provides complementary examples and additional insight into previous reports. [5][6][7][8][9][10]12 This catalytic system is suitable for a broad substrate scope, especially for those containing heteroatoms. More importantly, it works effectively on late-stage hydrosilylation, which is rarely reported before.…”

Ruthenium carbonyl-catalysed Si–heteroatom X coupling (X = S, O, N)

“…The mixture was heated in vacuo at 80 C for 4 h. For optimization studies, various conditions as shown in Table 1 have been used. After reaction, NMR was taken with CDCl 3 as the solvent [34]. For isolated yield determination, the catalytic mixture containing selected products as described in Table 2 was concentrated and passed through a column of silica gel 60 of dimension Ø14 Â 180 mm using a 1:1 mixture of hexane and chloroform.…”

The thioether spacer in liquid crystalline polysiloxanes with cyano- and nitrobiphenyl mesogens

“…There are lots of free Si1H groups left. Voronkov et al 26) have already shown, by studying the reaction between triethoxysilane and 2-(2-propenylthio)propane, that when the sulfur atom is in allylic position, many side reactions are possible.…”