Abstract New, green methods have been elaborated for the syntheses of α-hydroxyphosphonates and α-hydroxymethylenebisphosphonic derivatives (HMBPs, dronates). α-Hydroxyphosphonates were prepared via the Pudovik reaction, while the synthesis of HMBPs has been performed in the three-component reaction of carboxylic acids, phosphorus trichloride and phosphorus acid. Graphical Abstract
Nafion®-supported oxovanadium-catalyzed hydrophosphonylation of aldehydes under solventless conditions
作者:Shiue-Shien Weng、Guan-Ying Lin、Hsin-Chun Li、Kuo-Chen Yang、Teng-Mao Yang、Hui-Chi Liu、Syuan-Hua Sie
DOI:10.1002/aoc.2879
日期:2012.9
A Nafion® resin‐supported oxovanadium(IV) catalyst was readily prepared via ion‐exchange method. This solid vanadyl perfluorinated sulfonate catalyst was used as an efficient and recoverable catalyst for the hydrophosphonylation of various aldehydesundersolventlessconditions at room temperature. The catalyst could be recovered by simple filtration and reused without a significant loss of activity
Highly Enantioselective Aerobic Oxidation of α-Hydroxyphosphonates Catalyzed by Chiral Vanadyl(V) Methoxides Bearing <i>N</i>-Salicylidene-α-aminocarboxylates
作者:Vijay D. Pawar、Sampada Bettigeri、Shiue-Shien Weng、Jun-Qi Kao、Chien-Tien Chen
DOI:10.1021/ja060639o
日期:2006.5.1
An unprecedented vanadyl(V) methoxide complex 4 derived from 3,5-dibromo-N-salicylidene-l-tert-leucinate enables highly enantioselective aerobic oxidations of α-hydroxyphosphonates at ambient temperature with selectivity factors ranging from 3 to >99.
AbstractA series of dibenzyl α‐hydroxyphosphonates and the corresponding α‐hydroxyphosphonic acids, mostly new compounds, have been synthesized. The dibenzyl α‐hydroxyphosphonates have been obtained in the Pudovik reaction of substituted benzaldehydes and dibenzyl phosphite in the presence of triethylamine as the catalyst. The amount of the solvent was minimized during the reaction, and the workup involved crystallization from the reaction mixture. A new protocol was developed to transform the dibenzyl 1‐hydroxyphosphonates to the corresponding phosphonic acids by catalytic hydrogenation. The derivatives prepared were screened as potential cytotoxic agents against Mes‐Sa human uterine sarcoma cell line.
The typical crystal structures of a few representative α-aryl-α-hydroxyphosphonates
The crystal structures of seven α‐aryl‐α‐hydroxyphosphonates synthesized by the Pudovik reaction of substituted benzaldehydes and dialkylphosphites, namely dimethyl [(hydroxy)(phenyl)methyl]phosphonate, C9H13O4P, dimethyl [(3,4‐dimethoxyphenyl)(hydroxy)methyl]phosphonate, C11H17O6P, dimethyl (1‐hydroxy‐1‐phenylethyl)phosphonate, C10H15O4P, dimethyl [1‐hydroxy‐1‐(4‐nitrophenyl)ethyl]phosphonate, C10H14NO6P
由取代的苯甲醛和亚磷酸二烷基酯的Pudovik反应合成的七种α-芳基-α-羟基膦酸酯的晶体结构,即[(羟基)(苯基)甲基]膦酸二甲酯,C 9 H 13 O 4 P,二甲基[(3, 4-二甲氧基苯基)(羟基)甲基]膦酸酯,C 11 H 17 O 6 P,二甲基(1-羟基-1-苯基乙基)膦酸酯,C 10 H 15 O 4 P,二甲基[1-羟基-1-(4-硝基苯基]乙基]膦酸酯,C 10 H 14 NO 6 P,二苄基[羟基(2-硝基苯基)甲基]膦酸酯,C 21 H 20 NO研究了6 P,[(3-氯苯基)(羟基)甲基]膦酸二苄酯C 21 H 20 ClO 4 P和[羟基(4-甲基苯基)甲基]膦酸二苄酯C 22 H 23 O 4 P更好地了解这类固态分子的组织。从这一系列化合物获得的晶体显示出在C-OH…O = P链状堆积和具有这种功能的分子间对的氢键桥的二聚体类型之间达到平衡。该描述基于主要的