CAS: 699-98-9; 2,3-Pyridinedicarboxylicanhydride

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98278-78-5 112110-17-5 90376-83-3

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CAS号89-00-9 吡啶-2,3-二羧酸 | CAS号108-24-7 乙酸酐 | CAS号10026-13-8 五氯化磷 | CAS号4430-77-7 6,7-二氢吡啶并[2,3-d... | CAS号39551-54-7 2,4-二氯吡啶并[3,2-d]嘧啶 | CAS号37538-68-4 吡啶并[3,2-d]嘧啶-2,... | CAS号4664-00-0 2,3-吡啶二甲酰亚胺 | CAS号147779-25-7 2-苯甲酰基烟酸 | CAS号203728-96-5 5-(4-methylphen... | CAS号211629-98-0 5-phenylpyrido[... | CAS号23826-71-3 4-Methoxyphenyl... | CAS号24195-07-1 3-羧酸吡啶-2-甲酸甲酯 | CAS号24195-02-6 2,3-吡啶二羧酸-3-甲酯

2,3-吡啶二甲酸置于乙酸酐体系中,用 甲苯 作为反应溶剂,化学反应 3.0H,反应生成 2,3-吡啶二羧酸酐
参考文献:(S,S)-2,8-二氮杂双环[4.3.0]壬烷的高效合成
标题:(S,S)-2,8-二氮杂双环[4.3.0]壬烷的高效合成
摘要:摘要 建立了一条高效的莫西沙星手性中间体的五步合成路线.首先,脱水,N-酰化和环化合一锅,满足工业要求.然后在催化加氢反应中采用较低的氢气压力,产率较高.采用异丙醇/水系统进行拆分,保证了高收率和完美的光学纯度.由二氧化锰和 Pd/c 进行的外消旋过程成功地将不需要的对映体转化为外消旋体,因此总产率显着增加.此外,脱苄过程采用温和的氢转移催化加氢方法代替高压加氢.总收率达到39.0%,远高于文献中的29.0%.图形概要
DOI:10.1080/00397911.2016.1261164

专利信息

专利号:US-8680276-B2
优先权日:2009-03-06
标题 :Synthesis of (4aS,7aS)-octahydro-1H-pyrrolo[3,4-b]pyridine
发明人：MOTTERLE RICCARDO; ARVOTTI GIANCARLO; BERGANTINO ELISABETTA; CASTELLIN ANDREA; FOGAL STEFANO; GALVAGNI MARCO
权利人:MOTTERLE RICCARDO; ARVOTTI GIANCARLO; BERGANTINO ELISABETTA; CASTELLIN ANDREA; FOGAL STEFANO; GALVAGNI MARCO
摘要:The present invention relates to the stereoselective synthesis of (4aS,7aS)-octahydro-1H-pyrrolo[3,4-b]pyridine, as well as the conversion thereof, to give Moxifloxacin. Particularly, the present invention relates to a method for the synthesis of (4aS,7aS)-octahydro-1H-pyrrolo[3,4-b]pyridine of formula (I) comprising: (a) the optical resolution by enzymatic hydrolysis of the intermediate dialkyl-1-alkylcarbonylpiperidine-2,3-dicarboxylate racemate of formula (II) to give, following isolation, the intermediate dialkyl-(2S,3R)-1-alkylcarbonyl-piperidine-2,3-dicarboxylate of formula (III) in which AIk is a straight or branched C1-C5 alkyl group; (b) the conversion of the intermediate (III) to (4aR,7aS)-1-alkylcarbonylhexahydrofuro[3,4-b]pyridine-5,7-dione of formula (IV) in which AIk has the meanings set forth above; (c) the conversion of the intermediate (IV) to (4aS,7as)-octahydro-1H-pyrrolo[3,4-b]pyridine of formula (I) with an optical purity above 99%.

专利号:US-2010055750-A1
优先权日:2008-09-03
标 题:Polyester synthesis
发明人：WOSNICK JORDAN H
权利人:XEROX CORP
摘要:The present disclosure provides for enzymatic polymerization to produce polyester resins suitable for use in manufacturing toners. In embodiments, crystalline copolymers, which are polyesters, may be synthesized from lactones, cyclic anhydrides, cyclic carbonates, and combinations thereof. These crystalline copolymers, in turn, may be utilized in the synthesis of toner particles.

专利号:WO-2021224280-A1
优先权日:2020-05-05
标题:Synthesis of a sickle cell disease agent and intermediates thereof
发明人：JUDGE THOMAS; SCHROEDER MEL C; KOPEL LUCAS C; EKLOV BRIAN M
权利人:DIPHARMA FRANCIS SRL
摘要:New processes for preparing 2-hydroxy-6-((2-(1-isopropyl-1H-pyrazol-5- yl)pyridin-3-yl)methoxy)benzaldehyde, an agent developed for the treatment of sickle cell disease, and intermediates thereof, are provided herein.

专利号:WO-2025124564-A1
优先权日:2023-12-15
标题:Polyester synthesis based on aspartic acid modification
发明人：ZHANG KECHUN; CHEN XI; LEI TENGFEI; LIU SHENGYANG
权利人:MINT BIOTECHNOLOGIES CO LTD
摘要:Provided in the present invention is polyester synthesis based on aspartic acid modification. A monomer of a unique structure of an imide ring is obtained based on aspartic acid and a dibasic acid likely to be cyclized, the monomer is based on the aspartic acid, can be derived from biomass, is low in cost and renewable, meets the requirement of sustainable development, and the unique structure of the monomer can regulate and control various properties of polyester materials, such as the mechanics, temperature resistance, hydrophilicity and hydrophobicity, and crystallization.

专利号:US-8563734-B2
优先权日:2008-11-13
标题 :2-[1-cyanopropyl)carbamoyl]-5-chloromethyl nicotinic acids and the use thereof in manufacturing herbicidal imidazolinones
发明人：MENGES FREDERIK; GEBHARDT JOACHIM; RACK MICHAEL; KEIL MICHAEL; KLIMA RODNEY F; CORTES David; LEICHT ROBERT; ZECH HELMUT; SCHROEDER JOCHEN
权利人:MENGES FREDERIK; GEBHARDT JOACHIM; RACK MICHAEL; KEIL MICHAEL; KLIMA RODNEY F; CORTES David; LEICHT ROBERT; ZECH HELMUT; SCHROEDER JOCHEN; BASF SE
摘要:2-[(1-cyanopropyl)carbamoyl]-5-chloromethyl nicotinic acids of formula (I) where Z is hydrogen or halogen; Z 1 is hydrogen, halogen, cyano or nitro; R 1 is C 1 -C 4 alkyl; R 2 is C 1 -C 4 alkyl, C 3 -C 6 cycloalkyl or R 1 and R 2 , when taken together with the atom to which they are attached, represent a C 3 -C 6 cycloalkyl group optionally substituted with methyl, and R 3 is hydrogen or a cation preferably selected from the group consisting of alkali metals, alkaline earth metals, manganese, copper, iron, zinc, cobalt, lead, silver, nickel, ammonium and organic ammonium; are useful intermediates for the synthesis of herbicidal imidazolinones.

专利号:CA-2704377-C
优先权日:2009-05-26
标 题 :Processes for the synthesis of polyester resins