The synthesis of silacycles is highly appealing due to their important applications in organic synthesis, medicinal chemistry, and materials chemistry. However, sila-tetralins and sila-benzosuberanes are surprisingly under-represented due to a lack of general methods to access these compounds. We successfully developed a Pd-catalyzed strain-release silicon-based cross-coupling as an unprecedented ring-expansion
Nickel‐Catalyzed Reductive C(sp
<sup>2</sup>
)−Si Coupling of Chlorohydrosilanes via Si−Cl Cleavage
作者:Zhen‐Zhen Zhao、Xiaobo Pang、Xiao‐Xue Wei、Xue‐Yuan Liu、Xing‐Zhong Shu
DOI:10.1002/anie.202200215
日期:2022.5.16
C−Si bond-forming reaction between R−X and Cl−Si(H)R2 was achieved using reductive nickel catalysis. This method offers access to structurally diverse aryl- and alkenylhydrosilanes from phenol and ketonederivatives. The reaction can be conducted on gram scale and allows for incorporating a hydrosilane moiety into biologically active molecules.
Conformational analysis of 3-methyl-3-silathiane and 3-fluoro-3-methyl-3-silathiane
作者:Svetlana V. Kirpichenko、Erich Kleinpeter、Igor A. Ushakov、Bagrat A. Shainyan
DOI:10.1002/poc.1758
日期:2011.4
conformational equilibria of 3‐methyl‐3‐silathiane 5, 3‐fluoro‐3‐methyl‐3‐silathiane 6 and 1‐fluoro‐1‐methyl‐1‐silacyclohexane 7 have been studied using low temperature 13C NMR spectroscopy and theoretical calculations. The conformer ratio at 103 K was measured to be about 5ax:5eq = 15:85, 6ax:6eq = 50:50 and 7ax:7eq = 25:75. The equatorial preference of the methyl group in 5 (0.35 kcal mol−1) is much less