CAS: 1592-70-7; 5,7-Dihydroxy-2-(4-Hydroxyphenyl)-3-Methoxy-4H-Chromen-4-One

上下游产品

2-methoxy-1-(2,4,6-trihydroxyphenyl)ethanone 4-benzoyloxy-benzoic acid-anhydride kaempferol 4'-(benzyloxy)-5,7-dihydroxy-3-methoxyflavone kumatakenin 5-hydroxy-3,4',7-trimethoxyflavone

📜山奈酚置于吡啶,甲醇,Aluminum (III) Chloride,Palladium 10% On Activated Carbon,氨,氢气,Potassium Carbonate,Potassium Iodide体系中,用 甲醇,二氯甲烷,乙酸乙酯,丙酮,乙腈 用作溶剂,化学反应 48.0H,反应生成4-乙烯基氯苄
参考文献:Selective Methylation Of Kaempferol Via Benzylation And Deacetylation Of Kaempferol Acetates
标题:Selective Methylation Of Kaempferol Via Benzylation And Deacetylation Of Kaempferol Acetates
摘要:开发了一种选择性对卡培菲醇进行单甲基化,二甲基化和三甲基化的策略,主要基于对卡培菲醇醋酸酯的选择性苄基化和可控的去乙酰化.通过对卡培菲醇四乙酰酸酯(1)的选择性去乙酰化和苄基化,分别得到了3,4',5-三乙酰卡培菲醇(2)和7-苄基-3,4'5-三乙酰卡培菲醇(8).通过可控的去乙酰化,然后对这两种中间体进行选择性或直接的甲基化,从卡培菲醇中总产率为51-77%制备了八种甲基化卡培菲醇.
Doi:10.3762/bjoc.11.33

专利信息

专利号:US-11753503-B2
优先权日:2018-05-17
标 题:Supported onium salts as initiators for the synthesis of polycarbonates by copolymerization of CO2 with epoxides
发明人：FENG XIAOSHUANG; PATIL NAGANATHA; LUCIANI CAROLINE; GNANOU YVES; HADJICHRISTIDIS NIKOS
权利人:UNIV KING ABDULLAH SCI & TECH
摘要:Supported onium salts used as initiators for the synthesis of polycarbonates by copolymerization of carbon dioxide with epoxides are described. Embodiments of the present disclosure describe initiators comprising an insoluble portion including an onium cation attached to an insoluble support; and an anion, wherein the anion is a counter-ion to the onium cation. Embodiments further describe methods of making polycarbonates using the initiator, methods of making initiators, and the like.

专利号:EP-0791575-A1
优先权日:1996-02-16
标题 :Method of synthesis of a quaternary ammonium salt
发明人：NAKANO SHINJI
权利人:NIPPON PAINT CO LTD
摘要:The present invention provides an improved method of synthesis of a quaternary ammonium salt in which a tertiary amine is reacted with a benzyl halide optionally having on the benzene ring and/or at the α-site one ore more substituent groups inert to the reaction, which method is characterized in that the reaction is carried out in water or in a water-containing organic solvent.

专利号:US-7592392-B2
优先权日:2003-04-04
标 题 :Synthesis of functional polymers for use in organic synthesis and combinatorial chemistry
发明人：LINDSLEY CRAIG W; WISNOSKI DAVID D
权利人:MERCK & CO INC
摘要:The present invention relates to a novel process for the preparation of solid-supported scavenging reagents and solid-supported functional polymers. The invention further relates to novel solid-supported functional polymers and to their use in organic synthesis and combinatorial chemistry.

专利号:WO-0146695-A1
优先权日:1999-12-08
标 题:Novel supports for solid phase synthesis
发明人：ANTONENKO VALERY V; THIELE JOCHEN; ATUEGBU ANDY E
权利人:GLAXO GROUP LTD; ANTONENKO VALERY V; THIELE JOCHEN; ATUEGBU ANDY E
摘要:Novel solid supports and methods for their use in the synthesis of chemical compounds by the sequential addition of chemical building blocks are provided. The solid support comprises a polymer having reactive groups (for example, poly(styrene-co-vinylbenzyl chloride)) grafted to a chemically inert bulk material (such as a Teflon® membrane).

专利号:US-9090545-B2
优先权日:2011-10-14
标 题 :Asymmetric synthesis of organic compounds
发明人：FLETCHER STEPHEN P; MAKSYMOWICZ REBECCA M; ROTH PHILIPPE M C
权利人:ISIS INNOVATION
摘要:The present invention provides processes for the production of chiral compounds in a stereoisomeric excess. The present processes involve reacting a hydrometallated alkene compound with a compound comprising a conjugated-bond system under conditions such that the compounds undergo an asymmetric 1,4- or 1,6-conjugate addition reaction, generating a chiral compound in a stereoisomeric excess. The reaction is performed in the presence of a metal catalyst, which catalyst preferably comprises a non-racemic chiral ligand.

专利号:US-6812307-B2
优先权日:2002-08-16
标 题:Functionalized monomers for synthesis of rubbery polymers
发明人：HALASA ADEL FARHAN; HSU WEN-LIANG
权利人:GOODYEAR TIRE & RUBBER
摘要:This invention is based upon the unexpected finding that random copolymers of 1,3-butadiene monomer and 3-(2-pyrrolidinoethyl) styrene and/or 4-(2-pyrrolidinoethyl) styrene having a low vinyl content can be synthesized by anionic polymerization at normal polymerization temperatures without the need for a conventional polar modifier. The subject invention more specifically discloses a process for synthesizing a rubbery polymer that comprises copolymerizing at least one conjugated diolefin monomer and at least one functionalized monomer in an organic solvent at a temperature which is within the range of 20° C. to about 100° C., wherein the polymerization is initiated with an anionic initiator, wherein the functionalized monomer is of the structural formula:wherein n represents an integer from 4 to about 10, and wherein the polymerization is conducted in the absence of conventional polar modifiers.