Synthesis and herbicidal activity of O,O-dialkyl phenoxyacetoxyalkylphosphonates containing fluorine
作者:Ting Chen、Ping Shen、Yanjun Li、Hongwu He
DOI:10.1016/j.jfluchem.2005.11.013
日期:2006.2
A series of substituted phenoxyacetoxyalkylphosphonates bearing fluorine were designed and synthesized. All the new compounds were identified by elemental analysis, IR, 1H NMR and MS and were tested for herbicidal activity in greenhouse at a rate of 1.5 kg/ha. The results of preliminary bioassay showed that fluorine moiety introduced to the core structure could help to improve the herbicidal activity
设计并合成了一系列带有氟的取代苯氧基乙酰氧基烷基膦酸酯。通过元素分析,IR,1 H NMR和MS鉴定了所有新化合物,并以1.5 kg / ha的速率测试了温室中的除草活性。初步生物测定的结果表明,引入核心结构的氟部分可以帮助提高除草活性,苯环中带有3-三氟甲基的化合物表现出更高的抑制活性。
Synthesis and Herbicidal Activity of Novel Dialkoxyphosphoryl Aryl Methyl 2-(4,6-Dimethoxypyrimidin-2-yloxy) Benzoate Derivatives
作者:Chuanfei Jin、Hongwu He
DOI:10.1080/10426507.2010.511512
日期:2011.7.1
series of dialkoxyphosphoryl aryl methyl 2-(4,6-dimethoxy-pyrimidin-2-yloxy) benzoate derivatives was designed and synthesized. All new compounds were identified by elemental analysis, infrared (IR), 1H-NMR, and mass spectrometry (MS). Their herbicidalactivity against a set of weed species was examined. Some of the compounds showed potential herbicidalactivity, which provided some indications for further
Hydrophosphonylation of aldehydes catalyzed by cyclopentadienyl ruthenium(II) complexes
作者:Ivânia R. Cabrita、Pedro R. Florindo、Paulo J. Costa、M. Conceição Oliveira、Ana C. Fernandes
DOI:10.1016/j.mcat.2018.03.001
日期:2018.5
This work reports the first method for the synthesis of α-hydroxyphosphonates from aldehydes catalyzed by cyclopentadienyl ruthenium(II) complexes. The best results were obtained using the system HP(O)(OEt)2/[RuClCp(PPh3)2] (5 mol%), affording the α-hydroxyphosphonates in good to excellent yields with high chemoselectivity. The catalyst [RuClCp(PPh3)2] can be used for at least 12 catalytic cycles with
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.
N-Heterocyclic Carbene Catalyzed Hydrophosphonylation of Aldehydes
作者:Lin He、Zhi-Hua Cai、Guang-Fen Du、Cheng-Zhi Gu、Bin Dai
DOI:10.1055/s-0030-1260045
日期:2011.7
N-Heterocycliccarbenecatalyzed Pudovik-type reaction of dimethyl trimethylsilyl phosphite and aldehydes for the construction of carbon-phosphorus bonds have been developed, providing α-hydroxyphosphonates in moderate to excellent yield. N-heterocycliccarbene - Pudovik-type reaction - α-hydroxyphosphonates - aldehydes - C-P bond