专利号:WO-0125179-A1 优先权日:1999-10-01 标 题:Preparation of tetracyclic intermediates 发明人:CHEN QING PING; WOODS ROSS ALEXANDER; ELLIOTT ROBYN LOUISE 权利人:INST OF DRUG TECHNOLOGY AUSTRA; CHEN QING PING; WOODS ROSS ALEXANDER; ELLIOTT ROBYN LOUISE 摘要:The invention provides a process for preparing deoxytetracyclic compounds of formula (I) useful in the synthesis of anthracyclines by the rearrangement of thiono ester derivatives followed by reduction, as well as intermediates useful therefor. In said formula, R is H or optionally protected OH.
专利号:US-7538061-B2 优先权日:2001-05-18 标题 :One-step production of 1,3-propanediol from ethylene oxide and syngas with a cobalt-iron catalyst 发明人:KNIFTON JOHN FREDERICK; JAMES TALMADGE GAIL; SLAUGH LYNN HENRY; WEIDER PAUL RICHARD; ALLEN KEVIN DALE; POWELL JOSEPH BROUN 权利人:SHELL OIL CO 摘要:Disclosed is a new catalyst composition comprising a bimetallic Co—Fe catalyst, optionally complexed with a ligand selected from a N-heterocycle, phosphine, or porphorine ligand, that provides a lower cost alternative for the one step synthesis of 1,3-propanediol (1,3-PDO) from ethylene oxide and synthesis gas. For example, a catalyst containing cobalt carbonyl: iron carbonyl with no ligand, or a catalyst containing a cobalt carbonyl: octaethylporphine iron acetate provide moderate yields of 1,3-PDO in a one step synthesis under mild conditions.
专利号:US-6166226-A 优先权日:1996-10-10 标题 :Synthesis of aryl ethers 发明人:BUCHWALD STEPHEN L; WOLFE JOHN P; PALUCKI MICHAEL 权利人:MASSACHUSETTS INST TECHNOLOGY 摘要:A method for preparing an aryl ether compound is provided in which an alcohol is reacted with an aromatic compound in the presence of a base, and a transition metal catalyst selected from the group consisting of platinum and nickel to form an aryl ether. The aromatic compound comprises an activated substituent, X, said activated substituent being a moiety such that its conjugate acid HX has a pKa of less than 5.0. The catalyst is preferably a soluble palladium complex in the presence of supporting ligands.
专利号:US-5831128-A 优先权日:1996-12-04 标题 :Synthesis of aromatic amines from chloroamatics 发明人:BELLER MATTHIAS; RIERMEIER THOMAS; REISINGER CLAUS PETER; HERRMANN WOLFGANG ANTON; GEISSLER HOLGER 权利人:HOECHST AG 摘要:The present invention relates to a process for the preparation of aromatic amines of the formula (I) n n Ar--NR.sup.1 R.sup.2 (I) n n in which Ar is ##STR1## and R 3 to R 9 independently of one another are hydrogen, C 1 -C 8 -alkyl, alkoxy-(C 1 -C 8 ), acyloxy-(C 1 -C 8 ), OAr, Ar, fluorine, chlorine, bromine, iodine, OH, NO 2 , CN, CO 2 H, CHO, SO 3 H, SO 2 R, SOR, NH 2 , NH-alkyl-(C 1 -C 12 ), N-alkyl 2 -(C 1 -C 12 ), NHCO-alkyl-(C 1 -C 12 ), CO-alkyl-(C 1 -C 12 ), NHCHO, COAr, CO 2 Ar, CF 3 , CONH 2 , CHCHCO 2 R, POAr 2 , PO-alkyl 2 -(C 1 -C 12 ), 5-ring heteroaryl, 6-ring heteroaryl, Si-alkyl 3 -(C 1 -C 12 ), where R=alkyl(C 1 -C 8 ), aryl(C 5 -C 10 ) and R 1 and R 2 independently of one another are hydrogen, C 1 -C 12 -alkyl, Ar as defined above, 5-ring heteroaryl, 6-ring heteroaryl, by reacting chloroaromatics of the formula II n n Ar--Cl (II) n n with ammonia or primary or secondary amines of the formula III n n R.sup.1 R.sup.2 NH (III) n n in which Ar and R 1 and R 2 are as defined above, which comprises reacting the starting materials in the presence of a palladium catalyst, a strong base and a halide cocatalyst in an inert solvent at temperatures of 80°-200° C.
专利号:US-6235871-B1 优先权日:1997-12-03 标题:Synthesis of oligoarylamines, and uses and reagents related thereto 发明人:SINGER ROBERT A; SADIGHI JOSEPH P; BUCHWALD STEPHEN L; MACKEWITZ THOMAS 权利人:MASSACHUSETTS INST TECHNOLOGY 摘要:The transition metal-catalyzed amination of aryl halides, in conjunction with an orthogonal protective group scheme, forms the basis of two routes to oligoaniline precursors. The oligoaniline precursors are soluble in a variety of common organic solvents, and are easily converted to the deprotected oligoanilines. The method allows the preparation of oligoanilines of even or odd chain lengths, and the incorporation of a variety of functional groups into the oligomers. Polyanilines of low polydispersity can also be prepared by this method.
专利号:US-2022274930-A1 优先权日:2019-06-14 标题:Processes and compounds for the decarboxylative amination of redox-active esters with diazirines 发明人:LOPCHUK JUSTIN M; CHANDRACHUD PREETI P 权利人:H LEE MOFFITT CANCER CT & RES 摘要:The invention described herein relates generally to processes for the synthesis of amine-containing organic compounds. More specifically, described herein relates to processes for the decarboxylative amination of redox-active esters with diazirines and the products formed thereof. Compounds for use in the above processes are also described.
参考标题:Catalyst-Controlled Regiodivergent Synthesis Of 1- And 3-Thiosugars With High Stereoselectivity And Chemoselectivity 作者:Yuexin Liu,Yang Jiao,Huajun Luo,Nianyu Huang,Mengnan Lai,Kun Zou,Hui Yao |发布日期:2021.5.7 摘要:An Effective Regiodivergent Synthesis Toward 1- And 3-Thiosugars Was Achieved Through Palladium And Cobalt Catalysis, Respectively. β-1-Thiosugars Were Obtained From 3,4-O-Carbonate-Glycals And Various Thiols Catalyzed By Pd2(Dba)3 In Good Yields With Exclusive Stereoselectivity And Chemoselectivity, While Only (3S)-3-Thiosugars Were Generated Via Co(Bf4)2. Experiments And Dft Calculations Supported