33973-48-7Relevant academic research and scientific papers
Catalytic synthesis of 1-arylethylphosphonates by the hydrogenation of unsaturated precursors in the presence of chitosan-based palladium catalysts
Finashina,Isaeva,Kustov,Gulyukina,Bondarenko,Beletskaya
, p. 990 - 995 (2006)
Three-component silica-supported palladium-containing systems based on chitosan were synthesized and studied by scanning electron microscopy. These systems showed catalytic activity in the hydrogenation (including chemoselective hydrogenation) of α,β-unsa
Selective hydrolysis of phosphorus(v) compounds to form organophosphorus monoacids
Ash, Jeffrey,Cordero, Paula,Huang, Hai,Kang, Jun Yong
, p. 6007 - 6014 (2021/07/21)
An azide and transition metal-free method for the synthesis of elusive phosphonic, phosphinic, and phosphoric monoacids has been developed. Inert pentavalent P(v)-compounds (phosphonate, phosphinate, and phosphate) are activated by triflate anhydride (Tf2O)/pyridine system to form a highly reactive phosphoryl pyridinium intermediate that undergoes nucleophilic substitution with H2O to selectively deprotect one alkoxy group and form organophosphorus monoacids.
Preparation method of large-steric-hindrance alkyl substituted phosphite diester
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Paragraph 0072-0075, (2020/04/06)
The invention discloses a preparation method of large-steric-hindrance alkyl substituted phosphite diester, and relates to a novel method for preparing the large-steric-hindrance alkyl substituted phosphite diester compound which is difficult to synthesiz
Oxidative Dephosphorylation of Benzylic Phosphonates with Dioxygen Generating Symmetrical trans-Stilbenes
Huang, Tianzeng,Chen, Tieqiao,Han, Li-Biao
, p. 2959 - 2965 (2018/03/09)
Under a dioxygen atmosphere, benzylphosphonates and related phosphoryl compounds can readily produce the corresponding trans-stilbenes in high yields with high selectivity upon treatment with bases. Various functional groups were tolerable under the reaction conditions.
Direct Aryloxylation/Alkyloxylation of Dialkyl Phosphonates for the Synthesis of Mixed Phosphonates
Huang, Hai,Denne, Johanna,Yang, Chou-Hsun,Wang, Haobin,Kang, Jun Yong
, p. 6624 - 6628 (2018/05/14)
A strategy for the direct functionalization strategy of inertial dialkyl phosphonates with hydroxy compounds to afford diverse mixed phosphonates with good yields and functional-group tolerance has been developed. Mechanistic investigations involving both NMR studies and DFT studies suggest that an unprecedented highly reactive PV species (phosphoryl pyridin-1-ium salt), a key intermediate for this new synthetic transformation, is generated in situ from dialkyl phosphonate in the presence of Tf2O/pyridine.
Efficient synthesis of α-substituted ethylphosphonates via CuH-catalyzed conjugate reduction of terminal alkenylphosphonate
Zhang, Li,Fang, Yewen,Jin, Xiaoping,Guo, Ting,Li, Ruifeng,Li, Yan,Li, Xie,Yang, Yi,Yuan, Meijuan,Tian, Zongming
supporting information, p. 4538 - 4541 (2017/11/03)
An unprecedented approach toward synthesis of α-substituted ethylphosphonates based on CuH-catalyzed conjugate reduction of vinylphosphonates has been successfully developed. This protocol features mild conditions, broad substrate scope, good functional group compatibility, high overall efficiencies, and easy gram-scale synthesis. The Cu-catalyzed reduction takes place in a highly selective manner on the phosphono substituted C[dbnd]C bond in the case of the reaction of alkenylphosphonates bearing both phosphono and alkyl or aryl substituted alkene moieties. Furthermore, the result of competitive reaction indicates that the Cu-catalyzed conjugate reduction of vinylphosphonate is more challenging and reproducible than the corresponding acrylate's reaction.
Metal-free diimide reduction of alkenylphosphonates: simple and efficient protocol for the synthesis of α-substituted ethylphosphonates
Fang, Yewen,Yuan, Meijuan,Jin, Xiaoping,Zhang, Li,Li, Ruifeng,Yang, Shaoshuai,Fang, Mei
supporting information, p. 1368 - 1371 (2018/03/23)
A simple and straightforward method for the synthesis of α-substituted ethylphosphonates via diimide reduction strategy is described. With K3PO4 or Na2CO3 as the basic additive, a range of terminal alkenylphosph
Applications of α-phosphonovinyl tosylates in the synthesis of α-arylethenylphosphonates via suzuki-miyaura cross-coupling reactions
Fang, Yewen,Li, Jinjian,Wu, Rong,Fang, Jianghua,Zhang, Li,Yuan, Meijuan,Li, Ruifeng,Jin, Xiaoping
supporting information, p. 798 - 801 (2015/04/14)
It has been demonstrated for the first time that α-phosphonovinyl tosylates could efficiently couple with a range of arylboronic acids to access α-arylethenylphosphonates. The unprecedented procedure exhibits excellent functional group tolerance, giving the terminal vinylphosphonates in good to excellent isolated yields (60-99%) under mild reaction conditions.
Asymmetric hydrogenation of diethyl 1-phenylvinylphosphonate by metal complexes in CH2Cl2 and in supercritical carbon dioxide using phosphite-type ligands
Ozolin,Lyubimov,Davankov
, p. 693 - 695 (2015/12/01)
Asymmetric hydrogenation of diethyl 1-phenylvinylphosphonate was carried out for the first time in dichloromethane and supercritical carbon dioxide in the presence of phosphite and amidophosphite ligands. The catalysts based on [Ir(COD)2]BARF (COD is 1,5-
Copper-catalyzed synthesis of alkylphosphonates from H-phosphonates and N-tosylhydrazones
Miao, Wenjun,Gao, Yuzhen,Li, Xueqin,Gao, Yuxing,Tang, Guo,Zhao, Yufen
, p. 2659 - 2664 (2013/01/15)
A new catalytic system for the alkylation of H-phosphonates and diphenylphosphine oxide with N-tosylhydrazones has been developed. In the presence of copper(I) iodide and base, H-phosphonates react with N-tosylhydrazones to afford the corresponding coupled alkylphosphonates in good to excellent yields without any ligands. Alkylphosphonates can also be prepared in a one-pot process directly from carbonyl compounds without the isolation of tosylhydrazone intermediates.
