CAS: 13590-82-4; Cerium(Iv) Sulfate

相似化合物

13590-82-4 13454-94-9

专利信息

专利号:US-11161827-B2
优先权日:2019-04-05
标 题 :Catalytic systems for stereoselective synthesis of chiral amines by enantiodivergent radical C—H amination
发明人：Zhang xiao-xiang; Lang kai
权利人:TRUSTEES BOSTON COLLEGE; THE TRUSTEES OF BOSTON COLLEGE
摘要:In one aspect, the disclosure relates to a mode of asymmetric induction in radical processes based on sequential combination of enantiodifferentiative H-atom abstraction and stereoretentive radical substitution. Also disclosed is an asymmetric system for stereoselective synthesis of strained 5-membered cyclic sulfamides via radical 1,5-C—H amination of sulfamoyl azides. The disclosed metalloradical system can control the degree and sense of asymmetric induction in the catalytic radical C—H amination in a systematic manner. The disclosed system is applicable to a broad scope of substrates with different types of C(sp 3 )—H bonds and exhibits reactivity and selectivity, providing access to both enantiomers of useful 5-membered cyclic sulfamides in a highly enantioenriched form. Also disclosed are catalysts useful in these processes. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

专利号:US-2024075466-A1
优先权日:2021-04-09
标 题:One-Pot Synthesis of Transition Metal-Promoted Chabazites
发明人：VAN TENDELOO LEEN; SCHUETZE FRANK-WALTER; VERHEYEN ELKE JANE JUNE
权利人:UMICORE AG & CO KG
摘要:The invention provides methods for a one-pot synthesis of molecular sieves of the CHA-type. The method uses molecular and non-molecular sieves as sources of silicon and aluminum. A first OSDA is selected from tetraethylenepentamine (TEPA) and triethy-lenepentamine (TETA). The synthesis mixture comprises a first metal selected from copper, iron and zinc. Optionally, the synthesis mixture may furthermore comprise a second OSDA and/or a second metal selected from manganese, cesium, magnesium, calcium, strontium, barium, yttrium, titanium, zirconium, niobium, iron, zinc, silver, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium and mixtures thereof. The molecular sieves of the CHA-type obtainable by the method can be used as SCR-catalytically active substances for the removal of nitrogen oxides from exhaust gases of combustion engines.

专利号:US-2023183177-A1
优先权日:2020-04-24
标题:Enantioselective chemo-enzymatic synthesis of optically active amino amide compounds
发明人：GRILL BIRGIT; WINKLER MARGIT; SCHWAB HELMUT; STROHMEIER GERNOT; DONSBACH KAI; WALDVOGEL SIEGFRIED R; ARNDT SEBASTIAN; WEIS DOMINIK
权利人:PHARMAZELL GMBH
摘要:The present invention relates to a novel biocatalytic process for the stereoselective preparation of alpha amino amide compounds catalyzed by NHase enzymes. A further aspect of the invention relates to novel NHase enzymes as well as further improved NHase enzyme mutants, nucleic acid molecules encoding these enzymes, recombinant microorganisms suitable for preparing such enzymes and mutants. Another aspect of the invention relates to a chemo-biocatalytic process for the preparation of lactam compounds comprising the new catalytic process for the preparation of alpha amino amide compounds catalyzed by NHase enzymes, as well as the chemical oxidation of the alpha amino amide by applying certain chemical oxidation catalysts suitable for converting the alpha amino amide under retention of its stereochemical configuration to the respective lactam. The novel chemo-biocatalytic process is particularly suited for the synthesis of valuable pharmaceutical compounds, like in particular (S)-Levetiracetam.

专利号:US-5554725-A
优先权日:1994-09-14
标题:Synthesis of dolastatin 15
发明人：PETTIT GEORGE R
权利人:UNIV ARIZONA
摘要:The present invention relates to the synthesis of natural (-)- dolastatin and the elucidation of the absolute configuration of this important sea hare constituent. A segment synthetic strategy was utilized for obtaining the Dolabella auricularia (Indian Ocean sea hare) depsipeptide dolastatin 15. Reaction of protected (S)-Hiva-(S)-Phe (2c) with isopropenyl chloroformate followed by Meldrum's ester, cyclization (2c→3a) of the product in toluene and finally methylation afforded the key (S)-dolapyrrolidine (Dpy) derivative (3b). Condensation of tripeptide (8) with the three unit Dpy segment (5b) followed by deprotection and coupling (diethyl phosphorocyanidate) led to dolastatin 15 in 11% overall yield. The powerful and selective activity of dolastatin 15 against the U.S. National Cancer Institute's panel of human cell lines is reported.

专利号:US-5112702-A
优先权日:1990-03-19
标题 :Electrochemical synthesis of H2 O2
发明人：BERZINS TALVILDIS; GOSSER LAWRENCE W
权利人:DU PONT
摘要:This invention concerns improved processes for the synthesis of H2O2 by means of the electrochemical reduction of oxygen in the presence of acid and halide, preferably bromide, conducted in an electrolytic cell or in the cathode compartment of a fuel cell. The processes described herein permit production of hydrogen peroxide in commercially useful concentrations.

专利号:US-2014234364-A1
优先权日:2011-09-23
标 题:Total synthesis and immunological evaluation of saccharide moieties of the lipopolysaccharide from neisseria meningitidis
发明人：SEEBERGER PETER H; YANG YOU; ANISH CHAKKUMKAL; REINHARDT ANIKA
权利人:MAX PLANCK GES ZUR FÖRDERUNG DER WISSENSCHAFTEN E V
摘要:The present invention relates to the total chemical synthesis of the monosaccharide 35 # (R′â•?H), the disaccharide 36 # (R′≠H; R″â•?H), the trisaccharide 37 # (R′≠H; R″≠H; R′″≠H) and the tetrasaccharide 1 # (R′≠H; R″≠H; R′″≠H) of the following general formula wherein R represents —Y—NH 2 Y represents a linker R′ is H or R″ is H or R′″ is H or of the lipopolysaccharide from Neisseria meningitidis , as well as to the trisaccharide 37 # and the tetrasaccharide 1 # , to vaccines containing at least one of the saccharides 1 # , 35 # , 36 # , and 37 # and to the use of such vaccine for immunization against diseases caused by infection with bacteria containing the tetrasaccharide α-GlcNAc-(1→2)-α-Hep-( 1→3 )-α-Hep-(1→5)-α-Kdo or the trisaccharide α-Hep-(1→3)-α-Hep-(1→5)-α-Kdo or α-GlcNAc-(1→2)-±-Hep-(1→3)-α-Hep, especially for immunization against meningitis, septicaemia, pneumonia and nasopharyngitis caused by Neisseria meningitidis.