CAS: 623-68-7; But-2-Enoic Anhydride

相似化合物

2051-76-5 624-48-6 624-49-7

上下游产品

CAS号107-93-7 巴豆酸 | CAS号123-73-9 2-丁烯醛 | CAS号674-82-8 双乙烯酮 | CAS号3724-65-0 巴豆酸 | CAS号6443-91-0 methoxyethyne | CAS号927-80-0 乙氧基乙炔,己烷溶液 | CAS号625-35-4 巴豆酰氯 | CAS号10487-71-5 丁烯酰氯 | CAS号121-44-8 三乙胺 | CAS号71-43-2 苯 | CAS号90719-30-5 (4S)-N-巴豆酰基-4-异... | CAS号50888-73-8 buta-1,3-dien-1-one | CAS号74-99-7 丙炔 | CAS号27819-09-6 2-methylprop-2-... | CAS号100127-06-8 2-chloro-3,3-bi... | CAS号79-00-5 1,1,2-三氯乙烷 | CAS号187737-37-7 propene | CAS号592-46-1 2,4-己二烯 | CAS号10141-07-8 [(E)-1-[(E)-but... | CAS号109299-92-5 3-[(E)-2-丁酰基]-1...

巴豆酸置于氯(二甲基氨基)二甲基-甲烷氯化铵(1:1),三乙胺体系中,用 二氯甲烷 作为反应溶剂,化学反应 18.0H,以83%的收率获得产物巴豆酸酐
参考文献:N,N,N',N'-四甲基氯甲脒氯化物在温和条件下由酸一锅法合成酸酐
标题:N,N,N',N'-四甲基氯甲脒氯化物在温和条件下由酸一锅法合成酸酐
摘要:N,N,N',N'-四甲基氯甲脒氯化物在叔胺存在下与多种羧酸和磷酸顺利反应,以高产率得到相应的酸酐.
DOI:10.1246/bcsj.56.3529

专利信息

专利号:US-2012178961-A1
优先权日:2009-07-02
标题:Bio-derived olefin synthesis
发明人：SANDERS JOHAN PIETER MARINUS; VAN HAVEREN JACOBUS; SCOTT ELINOR; VAN ES DANIEL STEPHAN; LE NOTRE JEROME; SPEKREIJSE JURJEN
权利人:SANDERS JOHAN PIETER MARINUS; VAN HAVEREN JACOBUS; SCOTT ELINOR; VAN ES DANIEL STEPHAN; LE NOTRE JEROME; SPEKREIJSE JURJEN; UNIV WAGENINGEN; STICHTING DIENST LANDBOUWKUNDI
摘要:Disclosed is a method for the combined synthesis of at least two vinylic monomers, at least one of which being an acrylic compound, comprising subjecting a monoconjugated alkene-1-carboxylic compound to reaction with a C 2 -C 4 alkene under conditions of olefin cross-metathesis. The invention is particularly useful for extracting value from protein side streams. Upon protein hydrolysis, suitable amino acids (preferably phenylalanine or tyrosine) are subjected to reductive amination so as to form the corresponding alkene-1-carboxylic acid. Preferably after esterification and separation, this is used in cross-metathesis for the concomitant production of styrene resp. hydroxy styrene, and acrylates. The invention is applicable more widely, to the synthesis of olefins on the basis of carbohydrates, naturally occurring phenolic components, natural protein resources, or amino acids obtained from fermentations.

专利号:US-11713329-B2
优先权日:2018-12-10
标 题 :Intermediates useful in the preparation of halichondrin compounds and methods for preparing the same
发明人：XU WEIPING
权利人:BEIJING TIENYI LUFU PHARMATECH CO LTD
摘要:The invention relates to intermediates useful in the preparation of halichondrin compounds, methods for preparing the same and use thereof, such as halichondrins, eribulin, or their analogs. The intermediates, the methods and use thereof are used for the synthesis of the C20-C26 fragment of halichondrin compounds. The raw materials in the synthetic route of the invention are cheap and easily obtained, the sources and the qualities of the raw materials are reliable. The choice of the methods useful in the synthesis of chiral central structures are based on the structural characteristics of the reactants, thus effectively improving the synthesis efficiency, reducing the difficulties and risks of product quality control, and avoiding the use of highly toxic and expensive organotin catalysts to significantly decrease costs and improve environmental friendliness.

专利号:US-2023357257-A1
优先权日:2020-12-28
标 题 :Novel process for the synthesis of noroxymorphone from morphine
发明人：GORBACHEV DMITRY; LAM HON WAI; SAXENA AAKARSH; SAXENA NAVIN SATYAPAL
权利人:NAVIN SAXENA RESEARCH & TECH PVT LTD
摘要:The present invention relates to a novel, efficient, pot- and atom-economical, and industrially applicable process for converting morphine to noroxymorphone using reagents and solvents of lesser toxicity and lower cost with respect to those used in the prior art.

专利号:US-4975519-A
优先权日:1989-05-12
标 题 :Novel polyacetal terpolymers of trioxane and alpha, alpha- and alpha, beta-isomers of glycerol formal and functional derivatives thereof
发明人：YANG NAN L; AUERBACH ANDREW; PESCE ROSE; BROUSSARD JERRY A; PAUL JAMES L
权利人:HOECHST CELANESE CORP
摘要:Cationic polymerization of trioxane and a mixture of ester derivatives of α,α- and α,β-isomers of glycerol formal yields acetal terpolymers having pendant functional groups (i.e., ester groups, or hydroxyl groups obtained by hydrolyzing ester groups, pendent from the polymer's backbone). The glycerol formal monomers employed in this invention may include functional groups selected from ester moieties which are protected from, and thus survive, the polymerization process with trioxane. These groups may then be present as functional reactive sites for the subsequent synthesis of block polymers and/or to chemically bind modifiers to the acetal terpolymer backbone, for example.

专利号:CA-3200832-A1
优先权日:2020-12-28
标 题:Novel process for the synthesis of noroxymorphone from morphine

专利号:US-2020399204-A1
优先权日:2018-01-18
标 题:Photo activator and manufacturing method of the same and photo alignment agent including the same
发明人：SHIN DONG MYUNG; LEE IN HYE
权利人:SHIN DONG MYUNG; HONGIK UNIV INDUSTRY ACADEMIC COOPERATION FOUNDATION
摘要:The present disclosure relates to the photoactive agent having an N—O—Câ•?O—C band and being mixed with a liquid crystal aligning agent, a manufacturing method of photoactive agent comprising a primary solution preparation step for preparing a primary solution by mixing and dissolving cyclohexanone oxime in a solvent, a secondary solution manufacturing step for preparing a secondary solution by mixing anhydride in the primary solution, a reaction step for proceeding a synthesis reaction of the photoactive agent in a reaction solution in which a catalyst is mixed with the secondary solution, and an extraction step for extracting the photoactive agent in the reaction process.