α-吡唑基-N-苯基-α-氨基膦酸酯的合成及生物活性的初步研究

α－氨基膦酸及其酯与α－氨基酸结构类似,其具有抑菌［１］、抗肿瘤［２］、杀虫［３］以及抗植物病毒［４～７］的活性．α－氨基膦酸酯上与磷原子相连的２个烷氧基不同、α位碳原子以及氨基上取代基的不同将导致生物活性的巨大差异［８］．吡唑是一具有多种生物活性的...     

N-芳基-异丙胺甲酰基膦酰胺甲酯的研究

Ｎ－芳基－异丙胺甲酰基膦酰胺甲酯的研究陈茹玉,李慧英,任康太（南开大学元素有机化学研究所,天津,３０００７１）关键词膦酰胺,氨基甲酰基膦酸酯,氢键Ｎ,Ｎ－二烷基－氨基甲酰基膦酰胺酯类化合物具有调节植物生长的活性［１］,Ｎ,Ｎ－二烷基－氨基甲酰基膦酸二...     

N—三苯锗丙酰基—α—氨基膦酸酯的合成及其性质研究

合成了两个系列含有三锗丙酰基的α－氨基磷酸酯类化合物，研究了空阻大的α－氨基膦酸酯与β－三苯锗丙酸的缩合方法、反应条件及反应机理，生物活性测定结果表明，这类衍生物与相应的α－氨基膦酸衍生物相比有显著抗癌活性和抗烟草病毒活性。     

N－三苯锗丙酰基－α－氨基膦酸酯的合成及其性质研究

合成了两个系列含有三苯锗丙酰基的α－氨基膦酸酯类化合物，研究了空阻大的α－氨基膦酸酯与β－三苯锗丙酸的缩合方法、反应条件及反应机理．生物活性测定结果表明，这类衍生物与相应的α－氨基膦酸衍生物相比有显著抗癌活性和抗烟草病毒活性。     

N—芳基—α—氨基苄基膦酸的合成及对钢铁的缓蚀性能研究

Ｎ－芳基－α－氨基苄基膦酸的合成及对钢铁的缓蚀性能研究朱传方高新蕾肖海燕（华中师范大学化学系武汉４３００７０）用于金属螯合和缓蚀的含氮烃基膦酸主要是应用甲醛、胺、亚磷酸酯（或亚磷酸）通过Ｍａｎｎｉｃｈ反应得到［１，２］而应用其它的醛尤其芳醛与胺合成膦...     

β-氨基膦酸(酯)和亚膦酸(酯)不对称合成

具有光学活性的β-氨基膦酸和亚膦酸是β-氨基酸的含磷类似物,具有广泛的生物和药物活性.本文综述了使用手性辅基诱导、酶手性拆分和手性催化剂催化3种方法不对称合成光学活性β-氨基膦酸(酯)和亚膦酸(酯)的研究进展.     

烃基氨基二甲撑基膦酸的合成及其阻垢和缓蚀性能研究

烃基氨基二甲撑基膦酸的合成及其阻垢和缓蚀性能研究朱传方，李中华，孙亚杰（华中师范大学化学系武汉４３００７０）（黑龙江农垦师专化学系哈尔滨）烃基氨基磷酸由于具有类似ＥＤＴＡ、ＮＴＰ（－ＣＨ＿２ＣＯＯＨ）的螫合结构，因而被广泛地用于对金属的缓蚀￣［１］、...     

氨基乙叉二膦酸双（二烷基锡）的合成

氨基乙叉二膦酸双（二烷基锡）的合成包光林（安徽医科大学化学教研室，合肥２３００３２）有机磷酸的有机锡衍生物具有很强的生理活性，作为杀虫剂、杀螨剂、表面消毒剂及聚烯烃的热稳定剂已在工农业生产中得到应用。关于有机多磷酸的有机锡衍生物研究不多￣［１，２］，...     

α—氨基膦（次膦）酸类衍生物的合成及其性质

采用8种合成方法,合成了38种α-氨基膦(次膦)酸类衍生物。发现部分α-氨基膦酸化合物中含有1个结晶水。测定了化合物的pK_α值。所有化合物都具有一定除草和杀菌活性。     

4—（4—氨基—3—甲基苯偶氮）苯磺酸的合成

４－（４－氨基－３－甲基苯偶氮）苯磺酸可做为染料中间体［１］．据其结构，一般认为可由对氨基苯磺酸重氮盐与邻甲苯胺通过偶合反应制备．初步实验表明，对氨基苯磺酸重氮盐与邻甲苯胺在弱酸及弱碱性介质下易发生氨基上的偶合反应，生成重氮氨基化合物；在强酸性介质下...     

亚磷酸二正丙酯的气相色谱法测定

采用气相色谱法分离和测定合成有机磷农药的中间体亚磷酸二正丙酯。试验结果表明,在 5％ OV－ 7/Chromosorb W－ AW DMCS（ 0.231～ 0.387 mm）的色谱柱上,亚磷酸二正丙酯与内标物联苯等之间具有较好的分离效果。并且,以联苯为内标物时,亚磷酸二正丙酯的质量校正因子相当稳定,fW. A=2.47± 0.09（α =0.05,n=5）。该法操作简便、快速,准确度和精密度较好,对同一试样的 5次平行独立测定的相对标准偏差（ RSD）为 1.57％;该法的标准加入回收率达 99.2％～ 101.9％。     

Cinchona-derived thiourea catalyzed hydrophosphonylation of ketimines—an enantioselective synthesis of α-amino phosphonates

A highly enantioselective addition of diphenyl phosphite to ketimines derived from isatins has been developed employing bifunctional thiourea-tertiary amine organocatalysts. A variety of isatins derived ketimines react well with diphenyl phosphite in the presence of Cinchona-derived thiourea (epiCDT) to provide biologically important chiral 3-substituted 3-amino-2-oxindoles (3a–l) in good yield (up to 88%) and good enantioselectivity (up to 97% ee). The three-component version of the reaction through a domino aza-Wittig/phospha-Mannich sequence has successfully been explored.     

Studies on reactions of the N-phosphonium salts of pyridines. XIII. Direct polycondensation reaction of carbon dioxide or disulfide with diamines under mild conditions

Polyureas of high molecular weight were obtained by the direct polycondensation reaction of carbon dioxide with diamines at 40°C for several hours under a pressure of carbon dioxide (below 30 atm) by use of diphenyl phosphite in pyridine. Optimal temperature and pressure were 40°C and 20 atm of carbon dioxide. The polycondensation reaction was also affected by solvents and type and amounts of tertiary amines. Pyridine was most effective as tertiary amine and solvent as well. Of the phosphorous compounds used, triaryl phosphites and diphenyl phosphite were most effective, but trialkyl phosphites failed to give polymer. The reaction was assumed to proceed via a carbamyl N-phosphonium salt of pyridine formed by dephenoxylation of phosphites. Similarly, polythioureas were prepared by heating a mixture of carbon disulfide, diamines, and diphenyl phosphite in pyridine at 40°C for 6 hr under nitrogen.     

Ti(O-isoPr)4 Catalyzed hydrophosphonylation of activated alkenes by diphenyl H-phosphonate

Diphenyl 2-(alkoxycarbonyl)alkylphosphonates were synthesized via a titanium alkoxide catalyzed Pudovik reaction under mild conditions. Methacrylates or acrylates were selectively hydrophosphonylated by diphenyl H-phosphonate even in the presence of a dialkyl phosphite.     

Stepwise formation of iridium(III) complexes with monocyclometalating and dicyclometalating phosphorus chelates

With the motivation of assembling cyclometalated complexes without nitrogen-containing heterocycle, we report here the design and systematic synthesis of a class of Ir(III) metal complexes functionalized with facially coordinated phosphite (or phosphonite) dicyclometalate tripod, together with a variety of phosphine, chelating diphosphine, or even monocyclometalate phosphite ancillaries. Thus, treatment of [IrCl(3)(tht)(3)] with stoichiometric amount of triphenylphosphite (or diphenyl phenylphosphonite), two equiv of PPh(3), and in presence of NaOAc as cyclometalation promoter, gives formation of respective tripodal dicyclometalating complexes [Ir(tpit)(PPh(3))(2)Cl] (2a), [Ir(dppit)(PPh(3))(2)Cl] (2b), and [Ir(dppit)(PMe(2)Ph)(2)Cl] (2c) in high yields, where tpitH(2) = triphenylphosphite and dppitH(2) = diphenyl phenylphosphonite. The reaction sequence that afforded these complexes is established. Of particular interest is isolation of an intermediate [Ir(tpitH)(PPh(3))(2)Cl(2)] (1a) with monocyclometalated phosphite, together with the formation of [Ir(tpit)(tpitH)(PPh(3))] (3a) with all tripodal, bidentate, and monodentate phosphorus donors coexisting on the coordination sphere, upon treatment of 2a with a second equiv of triphenylphosphite. Spectroscopic studies were performed to explore the photophysical properties. For all titled Ir(III) complexes, virtually no emission can be observed in either solution at room temperature or 77 K CH(2)Cl(2) matrix. Time-dependent DFT calculation indicates that the lowest energy triplet manifold involves substantial amount of metal centered (3)MC dd contribution. Due to its repulsive potential energy surface (PES) that touches the PES of ground state, the (3)MC dd state executes predominant nonradiative deactivation process.     

Thiourea catalyzed organocatalytic enantioselective Michael addition of diphenyl phosphite to nitroalkenes

Bifunctional thiourea catalyzes the enantioselective Michael addition reaction of diphenyl phosphite to nitroalkenes. This methodology provides a facile access to enantiomerically enriched β-nitrophosphonates, precursors for the preparation of synthetically and biologically useful β-aminophosphonic acids. DFT level of computational calculations invoke the attack of the diphenyl phosphite to the nitroolefin by the Re face, this give light to this scarcely explored process update in the literature. The computational calculations support the absolute configuration obtained in the final adducts.     

Synthesis of N-Phosphoryl Branched Peptides

H-phosphonates were conveniently prepared by direct transesterification of diphenyl phosphite (DPP) with the corresponding alcohols, without further purification they were reacted with branched peptide methyl ester (L-Leu2-L-LysOMe) through Atherton-Todd method, a series of different substituted alkyloxy (N-phosphoryl-L-Leu)2-L-LysOMe were synthesized, and their stmctures were confirmed by ^31P NMR, ESI-MS, ^1H NMR, ^13C NMR, IR and elemental analysis. The approach possesses the advantages of easy operation, high yield and inexpensive phosphorylating reagent.     

Synthesis of Diphenyl α-（Dipropoxyphosphoramido）alkyl-phosphonates

A convenient method has been developed for the synthesis of diphenyl α-（dipropoxyphosphoramido）alkyl- phosphonates under mild conditions, namely the reaction of dipropyl phosphoramidate （1） with a para（un）substituted benzaldehyde or cyclicketone （2） and triphenyl phosphite （3） by a one-pot procedure with the aid of acetyl chloride.     

Studies on reactions of the N-phosphonium salts of pyridines—VII : Preparation of peptides and active esters of amino acids by means of diphenyl and triphenyl phosphites in the presence of tertiary amines

Peptides and active esters of amino acids were produced in high yields from carboxyl and amino or hydroxyl components in pyridine with an equivalent amount of diphenyl phosphite or half an equivalent amount of triphenyl phosphite and tertiary amines. Condensation reactions competed with the reaction with a phenoxy group of the phosphite to produce the phenyl ester and were governed by the tertiary amine employed in the reaction. The reactions are assumed to proceed via the N- phosphonium salts of pyridines, similar to those obtained by the oxidation of phosphorus compounds with mercuric salts in pyridine.     

Galactose-derived phosphonate analogues as potential inhibitors of phosphatidylinositol biosynthesis in mycobacteria

Galactose-based phosphonate analogues of myo-inositol-1-phosphate and phosphatidylinositol have been synthesized from methyl beta-d-galactopyranoside. Michaelis-Arbuzov reaction of isopropyl diphenyl phosphite or triisopropyl phosphite with a 6-iodo-3,4-isopropylidene galactoside afforded the corresponding phosphonates. Deprotection of the diphenyl phosphonate afforded methyl beta-d-galactoside 6-phosphonate, an analogue of myo-inositol-1-phosphate. The diisopropyl esters of the diisopropyl phosphonate were selectively deprotected and the corresponding anion was coupled with 1,2-dipalmitoyl-sn-glycerol using dicyclohexylcarbodiimide. Deprotection afforded a methyl beta-d-galactoside-derived analogue of phosphatidylinositol. The galactose-derived analogues of phosphatidylinositol and myo-inositol-1-phosphate were not substrates for mycobacterial mannosyltransferases (at concentrations up to 1 mM) involved in phosphatidylinositol mannoside biosynthesis in a cell-free extract of Mycobacterium smegmatis. The galactose-derived phosphonate analogue of phosphatidylinositol was shown to be an inhibitor at 0.01 mM of PimA mannosyltransferase involved in the synthesis of phosphatidylinositol mannoside from phosphatidylinositol, and a weaker inhibitor of the next mannosyltransferase(s), which catalyzes the mannosylation of phosphatidylinositol mannoside.