丁基锡炔基膦酸酯的合成

本文合成了１０个新的二（三）丁基锡炔基膦酸酯「（ｎ－（Ｃ４Ｈ９）ｎＳｎ」ｎ－１Ｏ２Ｐ（Ｏ）Ｃ≡ＣＲ（ｎ＝２,３;Ｒ＝ｎ－Ｃ５Ｈ１１,ｎ－Ｃ６Ｈ１３,Ｐｈ,ＣＨ２ＯＭｅ,ＣＨ２ＯＥｔ）通过元素分析,ＩＲ和＾１Ｈ ＮＭＲ确证了其结构。     

4-烷基双环磷酸酯的合成研究

双环磷酸酯,即2,6,7-三氧杂-1-磷杂双环[2.2.2]辛烷1-氧化物的同系物,是哺乳动物的惊厥剂。惊厥活性产生于双环磷酸酯抑制神经递质 GABA 生理效应,是 GABA 的重要拮抗剂。这类化合物具有简单的刚性笼形结构,化学稳定性好,可作为有效的工具药。在各种类型双环磷酸酯的衍生物中,结构     

苄基锡烯或炔基膦酸酯的合成

合成了具有通式为（ＰｈＣＨ２Ｓｎ）ｎ－１Ｏ２Ｐ（Ｏ）Ｒ（ｎ＝２，３；Ｒ＝－Ｃ＝ＣＰｈ，－Ｃ＝ＣＣ５ｈ１１－ｎ，－Ｃ＝ＣＣＨ２ＯＣＨ３，－ＣＨ＝ＣＣＩＰＨ）的８个苄基锡烯或炔基膦酸酯，并通过元素分析、ＩＲ和１ＨＮＭＲ对其进行了表征。     

Synthesis of Some Specifically Deoxygenated D-Hexopyranosyl Phosphates

Abstract

A number of diphenyl α-glucopyranosyl and xylopyranosyl phosphates (4, 7, 11. 15, 19, and 25) were prepared from their respective glycosyl chlorides by reaction with silver diphenyl phosphate. These sugar phosphates are of interest as enzyme substrates in deoxy sugar biosynthesis.     

稀土磷酸盐发光材料的微波合成

稀土磷酸盐发光材料的微波合成徐文国，田一光，刘淼，刘海堂，方光华，庞文琴（吉林大学化学系，环境科学系，长春，１３００２３）关键词微波合成，稀土磷酸盐，微晶玻璃，玻璃态，发光材料稀土磷酸盐发光材料的研究是当前材料科学的热门研究课题。它们一般通过高温固相...     

含溴笼状磷酸酯的合成和热重分析研究

用１－氧基磷杂－４－羟甲基－２，６，７－三氧杂双环「２．２．２」辛烷（ＰＥＰＡ）、２，４，６－三溴苯酚与三氯氧磷反应制得化合物ＰＤＴＰ、ＴＤＰＰ及ＴＴＢＰ。分析了反应的进程，通过元素分析、ＩＲ和ＨＮＭＲ证明了化合物的结构，用热重法分析了ＰＤＴＰ、ＴＴＢＰ的热稳定性及成炭性。     

A Convenient Synthesis of Allyltrimethylsilanes from Allylic Phosphates

Treatment of an allylic phosphate with trimethylsilyllithium or trimethylsilylcopper [prepared from one equivalent of trimethylsilyllithium and copper(I) iodide] affords allyltrimethylsilanes in good - excellent yields with high stereoselectivity.     

聚苯基磷酸酯(PPP)的合成及其阻燃机制

阻燃剂;环氧树脂;聚苯基磷酸酯(PPP)的合成及其阻燃机制     

Synthesis and Cellular Labeling of Caged Phosphatidylinositol Derivatives

Phosphatidylinositol (PI) is the biosynthetic precursor for seven phosphoinositides, important signaling lipids in cells. A membrane-permeant caged PI derivative featuring a photo-removable coumarinyl group masking the negative charge of the phosphate, as well as two enzymatically removable butyrate esters for increased lipophilicity and for preventing phosphate migration, were synthesized. Rapid cell entry and cellular labeling in fixed cells was demonstrated by a photo-cross-linkable diazirine followed by attachment of a fluorophore through click chemistry. Using this technique, we found that the multifunctional caged PI derivative resided predominantly at internal membranes but rapidly changed to the plasma membrane after uncaging. Accordingly, a preliminary proteomic analysis of the lipid–protein conjugates revealed that the two major PI transport proteins PITPα and β were prime targets of the photo-cross-linked PI derivative.     

Effect of Methanol on Enzymatic Synthesis of Phosphatidylinositol

The effect of methanol on enzymatic synthesis of phosphatidylinositol catalyzed by phospholipase D was studied. It was found that methanol enhances the transferase reaction under in vitro conditions to form the unnatural phospholipid phosphatidylmethanol.     

Synthesis of a Novel Type of Phosphates of Puerarin

A novel type of phosphated puerarin derivatives were synthesized through a simplified Atheron‐Todd reaction for the first time. The structure of these compounds were elucidated by IR, ESI‐MS and NMR. Moreover, the reason the dialkylphophite reagent had different chemselectivities toward different hydroxys on the puerarin was discussed.     

Synthesis and Characterization of New Variously Substituted Allylic Phosphates

New allylic phosphates were synthesized through phosphorylation of the corresponding alcohols. These compounds were obtained as mixtures of two (Z and E) isomers in 55–85% yield. They were characterized by multinuclear (¹H, ¹³C, ³¹P, and ¹⁹F) NMR, IR spectroscopy, and HRMS.     

Synthesis and Properties of Novel Hydrogels from Cross-linked Starch Phosphates

Summary: Starch based stable hydrogels providing high swelling and water storing capacity are not only of certain interest for the cosmetics and hygiene industry but also have the potential to become an effective tool in combating desertification and supporting cultivation in many regions of the world. It has been found that strong water adsorbing covalent networks with free swelling capacity (FSC) of up to 190 g water/g hydrogel can be obtained by cross-linking low-substituted mono-starch phosphates (MSP) in a semi-dry process with di- and tricarboxylic acids such as succinic acid (SA), adipic acid (AA) or citric acid (CA). The linear behaviour over a wide frequency range of the rheological parameters G′ and G″ which were determined by using a shearing disc viscosimeter clearly reveal that the cross-linked starch phosphates are stable hydrogels having stronger elastic than viscous properties.     

Synthesis of Cyclic Phosphates in Hot,Concentrated Phosphoric Acid

The synthesis of transition metal phosphates in hot, concentrated phosphoric acid medium leads to highly crystalline materials and to increased condensation of the phosphate at higher temperatures. Aluminum extraction from the porcelain crucible is also observed in some circumstances. Two new compounds were produced: (Al_3.28Cr_0.72)(P₄O₁₂)₃ a = 13.512(8) Å, cubic, I-43d, V = 2470(3) ų, Z = 6, density = 2.887 mg/m³, R = 0.055, GOF = 1.29 for 254 data points, was prepared at 748 K whereas (Al_1.97Cr_1.03)P₉O₂₇ a = b = 11.170(6), c = 9.412(9) Å, trigonal P – 3c1, V = 1017(1) ų, Z = 2, density = 2.669 mg/m³, R = 0.0581, GOF = 0.87 for 676 data points, was produced at 798 K from the heating of Cr₂O₃ in H₃PO₄ in a porcelain crucible. Crystal structures of both materials show mixed metal sites containing Al and Cr.     

The Synthesis and Crystal Structures of New Condensed Phosphates of Manganese

Abstract

This work deals with the synthesis of condensed phosphates of Mn(II), Mn(III), and also their combinations with Na, Cs. The reaction of MnO₂ with molten polyphosphoric acids, partially neutralized with carbonates of Na and Cs is used. In the course of reaction of MnO₂ with molten polyphosphoric acids, Mn(IV) is reduced to Mn(III) or/and Mn(II). The ratio Mn(III)/Mn(II) depends on the conditions of synthesis (temperature, time, presence of oxidants or reductants etc.). By varying these parameters we obtained 7 new manganese phosphates and determined their structures.     

New Approaches to the Synthesis of Titanium Phosphates from Crystalline Precursors

Doklady Chemistry - The possibility to synthesize titanium phosphate from crystalline titanium salts has been shown for the first time. Optimal synthesis conditions have been found to provide...     

Efficient and Convenient One‐Pot Synthesis of Phosphoramidates and Phosphates

A simple and efficient one‐pot method is described for the synthesis of phosphoramidates/phosphates in excellent yields from dialkylphosphites and trichloroisocyanuric acid in acetonitrile and subsequent treatment with dialkyl amines/alcohols. The procedure is operationally simple, has reduced reaction times, and uses a one‐pot procedure.