N-Heterocyclic Carbene Organocatalysts for Dehydrogenative Coupling of Silanes and Hydroxyl Compounds
作者:Dongjing Gao、Chunming Cui
DOI:10.1002/chem.201301893
日期:2013.8.19
Go organic! N‐Heterocyclic carbene (NHC) 1,3‐diisopropyl‐4,5‐dimethylimidazol‐2‐ylidene (IiPr) has been found to be an efficient and selective catalyst for the dehydrogenativecoupling of a wide range of silanes and hydroxyl groups to form SiO bonds under mild and solvent‐free conditions (see scheme). Mechanistic studies indicated that the activation of hydroxyl groups by the NHC is the most plausible
N-Heterocyclic Olefin Catalyzed Silylation and Hydrosilylation Reactions of Hydroxyl and Carbonyl Compounds
作者:Uǧur Kaya、Uyen P. N. Tran、Dieter Enders、Junming Ho、Thanh V. Nguyen
DOI:10.1021/acs.orglett.7b00306
日期:2017.3.17
N-Heterocyclic olefins (NHOs), the alkylidene derivatives of N-heterocycliccarbenes (NHCs), have recently emerged as a new family of promising organocatalysts with strong nucleophilicity and Brønsted basicity. The development of a novel method is shown using NHOs as efficient promoters for the direct dehydrogenative silylation of alcohols or hydrosilylation of carbonyl compounds. Preliminary results
Metal-Free Ammonium Iodide Catalyzed Oxidative Dehydrocoupling of Silanes with Alcohols
作者:Pailla Kumar、Sheng-rong Guo、Yan-qin Yuan
DOI:10.1055/s-0036-1588816
日期:2017.8
An ammonium iodide catalyzed direct oxidative coupling of silanes with alcohols to give various alkoxysilane derivatives was discovered. tert-Butyl hydroperoxide proved to be an efficient oxidant for this transformation. Attractive features of this protocol include its transition-metal-free nature and the mild reaction conditions.
Rhodium Carbene Complexes as Versatile Catalyst Precursors for SiH Bond Activation
作者:Anneke Krüger、Martin Albrecht
DOI:10.1002/chem.201102197
日期:2012.1.9
Rhodium(III) complexes comprising monoanionic C,C,C‐tridentate dicarbene ligands activateSiHbonds and catalyse the hydrolysis of hydrosilanes to form silanols and siloxanes with concomitant release of H2. In dry MeNO2, selective formation of siloxanes takes place, while changing conditions to wet THF produces silanols exclusively. Silyl ethers are formed when ROH is used as substrate, thus providing