Several new organomettalic isoxazoles, silylated and stannylated in the heterocyclic ring or in a side chain have been made. Their 13CNMR spectra are consistent with the previous conclusions on the electronic effects of MR3 and CH2MR3 (M = Si, Sn) groups, and indicate the importance of the pπ-dπ and σ-π mechanisms in the various ring positions.
已经制备了在杂环或侧链中甲硅烷基化和甲锡烷基化的几种新的有机金属异恶唑。其13 C NMR光谱与对MR的电子效应先前结论是一致的3和CH 2 MR 3(M =的Si,Sn)的基团,并注明的重要性p π - d π在和σ-π机制各种环位置。
Silylated azolium salts and their applications in the synthesis of azolines and β-enaminoketones bearing allyl-, vinyl-, and acylsilane or α-silylketone units
作者:Ana M. González-Nogal、Mariola Calle
DOI:10.1016/j.tet.2009.01.114
日期:2009.7
Differently silylated 3- or 4-isoxazolines and 3-pyrazolines, bearing versatile vinyl- or allylsilane moieties in various positions of the heterocyclic system, have been synthesized starting from new silylazolium salts by reduction with metal complex hydrides or alkylation with organolithium reagents. On the other hand, the reductive ring-opening of silylated isoxazolium salts with lithium dimethylcuprate
Catalytic <i>ipso</i>‐Nitration of Organosilanes Enabled by Electrophilic <i>N</i>‐Nitrosaccharin Reagent
作者:Ivan Mosiagin、Anthony J. Fernandes、Alena Budinská、Liana Hayriyan、Kai E. O. Ylijoki、Dmitry Katayev
DOI:10.1002/anie.202310851
日期:2023.10.9
Deploying N-nitrosaccharin reagents in combination with Lewis acid activation enables the facile, regio- and chemoselective nitration of (het)aryl silanes, allowing the introduction of nitro group under unprecedently mild conditions suitable for the late-stage nitration of complex and polyfunctionalized molecules. Theoretical and experimental mechanistic investigations formulate a plausible mechanism