专利号:US-11427530-B2 优先权日:2018-02-09 标 题 :Synthesis of 4-chlorokynurenines and intermediates 发明人:LEVIN DANIEL; LEEMING PETER; EISENREICH EMERICH; LIU XUEJUN KARL 权利人:VISTAGEN THERAPEUTICS INC 摘要:The invention relates to an overall enantio-specific synthesis of 4-chlorokynurenine compounds, in particular L-4-chlorokynurenine, with improved yields. Large-scale syntheses are disclosed. The invention also relates to novel intermediates in the synthesis of L-4-chlorokynurenine.
专利号:US-11794179-B2 优先权日:2016-08-24 标 题 :Synthesis and characterization of metathesis catalysts 发明人:JOHNS ADAM M 权利人:UMICORE AG & CO KG 摘要:This invention relates generally to olefin metathesis catalysts, to the preparation of such compounds, compositions comprising such compounds, methods of using such compounds, and the use of such compounds in the metathesis of olefins and in the synthesis of related olefin metathesis catalysts. The invention has utility in the fields of catalysis, organic synthesis, polymer chemistry, and in industrial applications such as oil and gas, fine chemicals and pharmaceuticals.
专利号:WO-2018191373-A1 优先权日:2017-04-12 标 题:Synthesis and characterization of metathesis catalysts 发明人:JOHNS ADAM 权利人:MATERIA INC 摘要:This invention relates generally to olefin metathesis catalysts, to the preparation of such compounds, compositions comprising such compounds, methods of using such compounds, and the use of such compounds in the metathesis of olefins and in the synthesis of related olefin metathesis catalysts. The invention has utility in the fields of catalysis, organic synthesis, polymer chemistry, and in industrial applications such as oil and gas, fine chemicals and pharmaceuticals.
专利号:US-4256649-A 优先权日:1977-10-20 标 题:Synthesis of olefinic oxides from olefin and oxygen 发明人:DYER PAUL N 权利人:AIR PROD & CHEM 摘要:Propylene oxide and other olefinic oxides are synthesized by reacting an olefin and oxygen in the presence of a catalytic amount of a complex. The complex is of the type L 2 MX 2 , L 2 M or L 2 MR where M is palladium, X is an acidic anion (preferably chloride); R is an olefinic group (preferably a propylene group) and L 2 consists of two monodentate ligands or a single bidentate ligand. n L 2 : n (a) is resistant to oxidation under the conditions of the process; n (b) is of the type AR 1 R 2 R 3 or R 4 R 5 AR 6 AR 7 R 8 where A is phosphorous or arsenic and R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 and R 8 are as defined herein; n (c) (in the case of a monodentate ligand) has a cone angle not less than 170° when A is phosphorous and has a cone angle not less than 142° when A is arsenic; or n (d) in the case of a bidentate ligand) the monodentate equivalent of each part of the bidentate ligand has a cone angle of not less than 170° when A is phosphorous and of not less than 142° when A is arsenic. n Increased yields of olefinic oxide may be obtained by the introduction of hydrogen.
专利号:WO-2024019972-A1 优先权日:2022-07-18 标 题:A method for the synthesis of tris(ortho-carboranyl)borane 发明人:Martin Caleb; AKRAM MANJUR 权利人:UNIV BAYLOR 摘要:The described process synthesizes a halide-free single-site borane compound product tris( ortho -carboranyl)borane, or B o Cb 3 . B o Cb 3 has Lewis superacid properties. The compounds, B o Cb 3 , are thermally stable, and not reactive towards oxygen, but are sensitive to water. The characteristic high fluoride ion affinity is further translated to the catalytic C-F bond activation reactions of the unactivated alkyl fluorides towards the reduction and C-C bond forming reactions with silanes, and Fridel-Crafts type reactions with arenes. The potential of the synthesized Lewis acid as a catalysis is anticipated.
专利号:US-8231848-B1 优先权日:2012-04-10 标题:One-pot synthesis of chalcopyrite-based semi-conductor nanoparticles 发明人:REN YUHANG; SUN CHIVIN; SHUM KAI 权利人:REN YUHANG; SUN CHIVIN; SHUM KAI; SUN HARMONICS LTD 摘要:Ternary and quaternary Chalcopyrite CuInxGa1-xSySe2-y (CIGS, where 0≰x and y≰1) nanoparticles were synthesized from molecular single source precursors (SSPs) by a one-pot reaction in a high boiling solvent using salt(s) (i.e. NaCl as by-product) as heat transfer agent via conventional convective heating method. The nanoparticles sizes were 1.8 nm to 5.2 nm as reaction temperatures were varied from 150° C. to 190° C. with very high-yield. Tunable nanoparticle size is achieved through manipulation of reaction temperature, reaction time, and precursor concentrations. In addition, the method developed in this study was scalable to achieve ultra-large quantities production of tetragonal and quaternary Chalcopyrite CIGS nanoparticles.