专利号:US-4756739-A 优先权日:1985-12-21 标题 :Pyridine derivatives and the N-oxides thereof, and the use thereof as intermediates for the synthesis of plant protecting agents 发明人:FUSS ANDREAS; KOCH VOLKER 权利人:HOECHST AG 摘要:The compounds of the formula I (I) in which A denotes N or N->O, Z denotes O or NH, R denotes H, (halo)alkyl, (halo)alkenyl, (halo)alkynyl or alkoxycarbonyl, R1 denotes hydrogen, halogen, amino, -NHOH, hydroxyl, (substituted) phenylazo or a radical of the formulae Y=C=N-, Y1Y2C=N-, Y3NH- or K denotes 0 or 1, and m and n, independently of one another, denote a number from 1 to 4, with the proviso that, when Z-R denotes OH or NH2, (R1)n denotes at least one radical of the formula or represents two radicals, in the 5 or 6 position of the heterocyclic ring, which, in the 5 position, denote halogen and, in the 6 position, denote a radical of the group comprising halogen, amino, hydroxyl or phenylazo, which may be substituted as specified above, are valuable intermediates in the synthesis of plant protection agents.
专利号:US-4985567-A 优先权日:1988-03-07 标题:Chiral phosphinopyrrolidine compounds and their use for asymmetric synthesis of optically active compounds 发明人:ACHIWA KAZUO; TAKEDA HIDEO 权利人:KAZUO ACHIWA; FUJI YAKUHIN KOGYO KK 摘要:New chiral phosphinopyrrolidine compounds of the general formula: ##STR1## wherein R 1 is hydrogen or --COA 1 , --COOA 2 , --CONHA 3 , --SO 2 A 4 or --PO(A 5 ) 2 , A 1 , A 2 , A 3 , A 4 and A 5 each represents independently alkyl or aryl, R 2 is phenyl, di(lower-alkyl)aminophenyl, lower-alkoxyphenyl or 3,5-dimethyl-4-methoxyphenyl, and R 3 is phenyl, lower-alkylphenyl, di(lower-alkyl)aminophenyl, lower-alkoxyphenyl or 3,5-dimethyl-4-methoxyphenyl, with the proviso that R 2 and R 3 may not simultaneously by phenyl, p-di(lower-alkyl)-aminophenyl or p-lower-alkoxyphenyl, as well as the use of these compounds as ligand for a metal complex catalyst for asymmetric synthesis of optically active compounds. The new chiral phosphinopyrrolidine compounds are useful ligands which attain both of high optical yield and high reaction efficiency in catalytic asymmetric reduction.
专利号:US-4096182-A 优先权日:1976-03-19 标 题:Process for the simultaneous preparation of 2,5-dioxo-1,2-oxa-phospholanes and β-halogenpropionic acid halide 发明人:RUPP WALTER; FINKE MANFRED 权利人:HOECHST AG 摘要:2,5-Dioxo-1,2-oxa-phospholanes of the formula (I) ##STR1## wherein R 1 is an organic radical and R 2 and R 3 each also represents an organic radical or hydrogen, are prepared by reacting 2-haloformylethyl-phosphinic acid halides of the formula (II) ##STR2## wherein R 1 , R 2 and R 3 are defined as in formula (I) and X means Cl or Br, preferably Cl, with an approximatey equimolar quantity of acrylic acid. The compounds (II) may also be produced in the reaction batch and in situ by reacting about equimolar quantities of a dihalophosphine of the formula (III) ##STR3## with an α,β-unsaturated acid (IV) n n R.sup.4 -- OH (IV) n n In the formulae (III) and (IV) R 1 , R 2 , R 3 and X are defined as indicated above. n In the reaction there is formed, in addition to the compounds (I), practically exclusively β-halopropionic acid and no free hydrogen halide. n The phospholanes (I) are valuable flame retarding agents for plastics, intermediates, for example, for the synthesis of biocidals etc.
专利号:US-12291489-B2 优先权日:2016-07-01 标 题 :Synthesis of nanocomposites and their use in enhancing plant nutrition 发明人:BISWAS PRATIM; RALIYA RAMESH 权利人:BISWAS PRATIM; RALIYA RAMESH; WASHINGTON UNIVERSITY ST LOUIS 摘要:The present disclosure is related to the development of improved fertilizer for precision and sustainable agriculture. A method was developed wherein efficient NPK nanocomposite for plant nutrition was synthesized in a single step using aerosol science and technology concepts. Further a formulation was prepared by addition of ZnO, TiO 2 and other nanoparticles to the NPK nanocomposite. Also, an aerosol based foliar application technique was developed for the precise delivery of nanoparticles to the plants.
专利号:US-4535144-A 优先权日:1983-01-28 标 题:Synthesis of high molecular weight polybenzimidazole with arylhalo phosphorus compound catalyst 发明人:CHOE EUI W; CONCIATORI ANTHONY B 权利人:CELANESE CORP 摘要:This invention provides a two stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of an arylhalophosphine or arylhalophosphite polymerization catalyst. The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and Plugging Value, and is further characterized by an inherent viscosity of at least about 1.0 dl/g, and a weight average molecular weight of at least about 100,000.
专利号:US-4533725-A 优先权日:1983-01-28 标题:Synthesis of high molecular weight polybenzimidazole with arylhalo phosphorus compound catalyst 发明人:CHOE EUI W; CONCIATORI ANTHONY B 权利人:DELANESE CORP 摘要:This invention provides a two stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of an arylhalophosphine or arylhalophosphite polymerization catalyst. The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and Plugging Value, and is further characterized by an inherent viscosity of at least about 1.0 dl/g, and weight average molecular weight of at least about 100,000.