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
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.
Synthesis and anticancer cytotoxicity with structural context of an α-hydroxyphosphonate based compound library derived from substituted benzaldehydes
active clusters, which encouraged us to synthesize further dibenzyl-α-diphenyl-OPP derivatives that elicited pronounced cell killing. Further structure–activity relationships showed the relevance of hydrophobicity and the position of substituents on the main benzene ring as determinants of toxicity. The most active analogs proved to be equally, or even more toxic to the multidrug resistant (MDR) cell line