一系列新颖的O,O-二甲基1-(取代的苯氧基乙酰氧基)-1-(吡啶-2-基或噻吩-2-基)甲基膦酸酯6a,6b,6c,6d,6e,6f,6g,6h,6i,合成了6j,6k,6l,6m,6n和7a,7b,7c,7d。其结构已通过IR确认11 H NMR,质谱和元素分析。初步生物测定的结果表明,某些标题化合物具有中等至良好的除草和杀真菌活性。例如,标题化合物6a,6c,6l,6m和7d在1500 g ai / ha的剂量下对大多数受试植物具有90-100%的抑制作用,而标题化合物6b,6g,6h和6n具有抑制作用针对92-100%抑制尖镰孢,Phyricularia菌,葡萄孢属cinereapers,玉蜀黍赤霉,浓度为50 mg / L的核盘菌菌核病菌(Sclerotinia sclerotiorum)和锥尾核孢菌(Cercospora beticola)。
The Preparation of Dimethyl α -Hydroxyphosphonates and the Chemical Shift Non-Equivalence of Their Diastereotopic Methyl Ester Groups
作者:Harry R. Hudson、Ramon O. Yusuf、Ray W. Matthews
DOI:10.1080/10426500701690905
日期:2008.6.9
alkanals, aryl aldehydes (or aryl methyl ketones), furfuraldehyde, and 2- or 3-thiophenecarboxaldehyde, respectively, thus confirming the general utility of this synthetic procedure. The 1H and 13C nmr spectra of the products exhibit characteristic chemical shift non-equivalence of the diastereotopic methyl ester groups, for which a tentative order of non-equivalence is reported and discussed.
Abstract 2-Thienyl-phosphonylcarbinols in acidic medium gave with alcohols and aromatic derivatives two classes of new compounds depending on the reaction temperature.
Silica-Supported Tungstic Acid Catalyzed Synthesis and Antioxidant Activity of <i>α</i>-Hydroxyphosphonates
作者:S. Santhisudha、P. Sreelakshmi、S. H. Jayaprakash、B. Vijaya Kumar、C. Suresh Reddy
DOI:10.1080/10426507.2014.991825
日期:2015.9.2
Abstract A green and efficient method has been accomplished for the synthesis of α-hydroxyphosphonates using silica-supported tungstic acid (STA) as a heterogeneous catalyst under solvent-free conditions at ambient temperature. The compounds obtained were characterized by spectral and analytical studies and screened in vitro for the antioxidant activity by four methods viz., DPPH free radical scavenging assay
Biocatalytic Promiscuity of Lipases in Carbon‐Phosphorus Bond Formation
作者:Dominik Koszelewski、Ryszard Ostaszewski
DOI:10.1002/cctc.201900397
日期:2019.5.20
A promiscuous lipase‐catalyzed carbon‐phosphorus bondformation is presented. The developed enzymatic Pudovik‐Abramov reaction of various aromatic and aliphatic aldehydes with dialkyl phosphonates provides biologically and pharmacologically relevant α‐hydroxy phosphonates with the yields from 11 % to 85 %. The developed protocol proceeds in the presence of porcine pancreas lipase under environmentally
SIMPLE AND IMPROVED PREPARATION OF α-OXOPHOSPHONATE MONOLITHIUM SALTS
作者:Tao Wang、Hong Wu He
DOI:10.1080/10426500490474941
日期:2004.10.1
Some α-OxoPhosphonate monolithium salts were synthesized by a facile one-step procedure. In this way, α-(2,4-dichlorophenoxyacetoxy)alkyl phosphonic acid dimethyl esters 5 can be transformed into the corresponding phosophonate monolithium salts 6 without influence on the carboxylic ester group under mild conditions.