Visible-Light Photo-Arbuzov Reaction of Aryl Bromides and Trialkyl Phosphites Yielding Aryl Phosphonates
作者:Rizwan S. Shaikh、Simon J. S. Düsel、Burkhard König
DOI:10.1021/acscatal.6b02591
日期:2016.12.2
Aryl phosphonates are functional groups frequently found in pharmaceutical and crop protection agents. For their synthesis via C–P bond formation typically transition-metal-catalyzed reactions are used. We report a visible-light photo-Arbuzov reaction as an efficient, mild, and metal-free alternative. Rhodamine 6G (Rh.6G) is used as the photocatalyst, generating aryl radicals under blue light. Coupling
Radical Arylation of Triphenyl Phosphite Catalyzed by Salicylic Acid: Mechanistic Investigations and Synthetic Applications
作者:Manel Estruch-Blasco、Diego Felipe-Blanco、Irene Bosque、Jose C. Gonzalez-Gomez
DOI:10.1021/acs.joc.0c00795
日期:2020.11.20
arylphosphonates at 20 °C within 1–2 h is reported using inexpensive SA as the catalytic promoter of the reaction. Mechanistic investigations suggest that the reaction proceeds via radical–radical coupling, consistent with the so-called persistent radical effect. The reaction tolerated a wide range of functional groups and heteroaromatic moieties. The synthetic usefulness and the unique reactivity of the
Metal-Free Aromatic Carbon–Phosphorus Bond Formation via a Sandmeyer-Type Reaction
作者:Shuai Wang、Di Qiu、Fanyang Mo、Yan Zhang、Jianbo Wang
DOI:10.1021/acs.joc.6b01820
日期:2016.12.2
proceeds smoothly at room temperature without the exclusion of moisture or air. This phosphorylation reaction tolerates a wide range of functional groups and affords the phosphorylation products in moderate to good yields, thus providing a valuable method for the formation of aromatic carbon–phosphorus bonds.
Water-Promoted Mild and General Michaelis–Arbuzov Reaction of Triaryl Phosphites and Aryl Iodides by Palladium Catalysis
作者:Jin Zhang、Wei Hu、Zihan Chen、Nuo Wu、Chunya Li、Tieqiao Chen、Li-Biao Han
DOI:10.1021/acs.orglett.4c00820
日期:2024.4.26
A Pd-catalyzed relatively general Michaelis–Arbuzov reaction of triaryl phosphites and aryliodides for preparing useful aryl phosphonates was developed. Interestingly, water can greatly facilitate the reaction through a water-participating phosphonium intermediate rearrangement process, which also makes the reaction conditions rather mild. In comparison with the known methods, this reaction is milder