CAS: 674-82-8; Acetyl Ketene

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CAS号463-51-4 乙烯酮 | CAS号67-64-1 丙酮 | CAS号574-39-0 9-乙酰基咔唑 | CAS号75-09-2 二氯甲烷 | CAS号201230-82-2 carbon monoxide | CAS号1971-49-9 N-乙酰邻苯二甲酰亚胺 | CAS号121-44-8 三乙胺 | CAS号75-36-5 乙酰氯 | CAS号75-50-3 三甲胺 | CAS号463-49-0 丙二烯 | CAS号106687-41-6 3-methyl-1,1-di... | CAS号118025-37-9 N-acetoacetyl-N... | CAS号1001-24-7 N-butyl-3-oxobu... | CAS号112369-47-8 3-羰基-N-(3-苯基-丙基)-丁酰胺 | CAS号112081-40-0 N-[2-(5-methoxy... | CAS号100063-41-0 5-Methyl-2-phen... | CAS号5437-98-9 乙酰基乙酰对甲氧基苯胺 | CAS号52793-11-0 N-(5-氯-2-甲氧基-苯基... | CAS号406-58-6 1,1,1,3,3-五氟丁烷 | CAS号3949-36-8 3-乙酰基香豆素

乙烯酮 反应 2.0H,反应生成 双乙烯酮
参考文献:一种制备方法,制备得到的烯酮类化合物以及该化合物的应用
标题:一种制备方法,制备得到的烯酮类化合物以及该化合物的应用
摘要:本发明提供了一种制备方法,制备得到的烯酮类化合物以及该化合物的应用,所述制备方法包括以下步骤:1)高温裂解:将有机酸或酸酐类裂解原料预热气化后进行高温裂解,得到高温裂解气;2)气液分离:将高温裂解气输送至旋风分离器中进行气液快速分离;3)产物收集:从旋风分离器中出来的气相产物通过吸收剂吸收或冷凝处理后进行收集,得到烯酮类化合物.本方法通过旋风分离器对裂解产物进行快速气液分离,可有效避免气相产物因在液相中的停留时间过长而发生逆反应.

专利信息

专利号:US-5484949-A
优先权日:1993-01-29
标题:Method for the synthesis of α β-unsaturated ketones
发明人：TSUKASHIMA KEIICHI; NAKAJIMA MASASHI; FUJIMARU MASAYOSHI; SUZUKI KENJI
权利人:NIPPON SODA CO
摘要:The present invention relates to a method for the synthesis of alpha , beta -unsaturated ketones which comprises, in the method for the synthesis of alpha , beta -unsaturated ketones represented by general formula reacting aldehydes represented by general formula R1CHO (where R1 is as defined above) with alkali metal salt of acetoacetic acid represented by general formula sence as a catalyst of 3-azabicyclo[3,2,2]nonane, a cyclic secondary amine represented by general formula (1) (1) a cyclic secondary amine represented by general formula (2) (2) (where, l is 1 or more and up to 6, a ring with N is a 6-membered, 7-membered or 8-membered ring, the two neighbors of N are methylene, R3 is a lower alkyl group, its substitution position is at a carbon atom other than two those adjacent to N, and is an alicyclic group or a phenol group), or a secondary amine represented by general formula (3) CH3NHCH2R4(3) in a mixuture solvent of water and water-insoluble organic solvent, while keeping the pH constant with mineral acid, and by adjusting an amount of water.

专利号:US-4705904-A
优先权日:1984-02-14
标 题:Vapor phase synthesis of hexafluoroisobutylene
发明人：BONFIELD JOHN H; ULMER HARRY E
权利人:ALLIED CORP
摘要:A vapor phase synthesis of hexafluoroisobutylene, which comprises contacting in the vapor phase in a catalyst zone, B, of a reactor hexafluoropropylene oxide with a fluorinated catalyst such as fluorinated silica-alumina at a temperature of about 400°-600° C. for a residence time sufficient to form a vapor stream comprising hexafluoroacetone which is thereafter directly contacted in a heating zone of the reactor with a vapor stream comprising a keytone-generating compound such as acetic anhydride at a temperature of about 500°-700° C. for a residence time sufficient to form a stream comprising hexafluoroisobutylene, substantially-free of perfluoroisobutylene and recovering the hexafluoroisobutylene product is disclosed. A direct one reactor vapor phase synthesis of hexafluoroisobutylene which comprises (a) contacting, in the vapor phase, hexafluoropropene with less than a stoichiometric amount of oxygen required to convert substantially all the hexafluoroisopropene into hexafluoropropylene oxide in the presence of a fluorinated catalyst such as fluorinated silica-alumina at a temperature of about 400°-600° C. for a time sufficient to form a vapor stream comprising hexafluoropropylene oxide substantially-free of oxygen; (b) directly contacting said vapor stream, in a catalyst zone, B, containing a fluorinated catalyst which is preferably the same as used in catalyst zone, A, at a temperature of about 400°-650°, preferably about 500°-650° C. for a time sufficient to form a vapor stream comprising hexafluoroacetone; (c) directly contacting the vapor stream comprising hexafluroacetone with a vaporized compound such as acetic anhydride at a temperature of about 500°-700° C., preferably about 600° C. for a time sufficient to form a vapor stream comprising hexafluoroisobutylene, substantially-free of perfluoroisobutylene; and (d) recovering hexafluoroisobutylene is also disclosed.

专利号:US-6642035-B2
优先权日:2001-01-26
标题 :Synthesis of B-keto esters
发明人：JANDA KIM D; CORDOVA ARMANDO
权利人:SCRIPPS RESEARCH INST
摘要:β-keto esters are prepared by way of a lipase-catalyzed transesterification. The synthetic methodology provides a simple scheme for the synthesis of optically active β-keto esters that are useful building blocks and starting materials for natural product synthesis. Moreover, the methodology employs mild, solvent-free conditions. The methodology may also be employed for resolving racemic alcohols.

专利号:US-2009221834-A1
优先权日:2006-04-20
标题 :Synthesis of 5-Beta-Keto-1,2,4-Oxadiazoles and Conversion of 5-Beta-Keto-1,2,4 Oxadiazoles to N-Pyrazolyl Amidoximes
发明人：JENSEN DAVID R; SIDENSTICK JOHN E
权利人:JENSEN DAVID R; SIDENSTICK JOHN E
摘要:The disclosed invention relates to a process for preparing 5-β-keto-1,2,4-oxadiazoles of formula (I), and conversion of 5-β-keto-1,2,4-oxadiazoles (I) into N-pyrazolyl amidoximes of the formula (II) through reaction with hydrazine. The process is defined by two steps. An amidoxime, which may be prepared in situ, is condensed with a β-keto ester to form a 5-β-keto-1,2,4-oxadiazole. The 5-β-keto-1,2,4-oxadiazole is subsequently reacted with hydrazine to furnish the desired N-pyrazolyl amidoxime. The disclosed invention provides several advantages over the current state of the art for the synthesis of N-pyrazolyl amidoximes, which require the condensation of a pyrzolylamine with an actived substrate and subsequent reaction with hydroxyl amine. N-pyrazolyl amidoximes are useful synthetic intermediates, especially for the preparation of photographic developing chemicals.

专利号:US-8105809-B2
优先权日:2008-07-03
标题 :Enzymatic synthesis of acetoacetate esters and derivatives
发明人：HENDERSON SAMUEL T
权利人:HENDERSON SAMUEL T; ACCERA INC
摘要:In one embodiment, the present invention includes a method for the synthesis of an ester derivative of acetoacetate. The method includes providing a first ester of acetoacetate and providing an alcohol. The method further includes combining the first ester of acetoacetate and the alcohol in the presence of an enzyme capable of transesterification in a non-aqueous solvent to form the ester derivative of acetoacetate. The method results in the formation of the ester derivative of acetoacetate, which, in one embodiment, is monoacetoacetin.

专利号:US-2025162968-A1
优先权日:2022-02-02
标 题 :Method for Producing Ionizable Lipids or Intermediates for the Synthesis of Such Lipids
发明人：ATMURI N D PRASAD; ARNOLD DEAGLAN; SAADATI FARIBA; KUREK DANIEL; KULKARNI JAYESH; WITZIGMANN DOMINIK; CIUFOLINI MARCO A
权利人:NANOVATION THERAPEUTICS INC
摘要:The present disclosure provides a method for producing one or more intermediates for the synthesis of one or more ionizable lipids, the method comprising: (i) producing a beta-ketoacid by reacting a cyclic ester, a terminal hydroxyester or a derivative thereof, a dicarboxylic acid half ester, or an acid chloride derivative of the dicarboxylic acid half ester, in a condensation reaction, thereby producing the beta-ketoacid or a beta-ketoester that is hydrolyzed to produce the beta-ketoacid; and (ii) decarboxylating the beta-ketoacid, thereby producing the one or more intermediates, wherein the one or more intermediates have a structure that may be defined by Formula A. Further provided is a method for producing ionizable lipid from the intermediate comprising adding an ionizable head group moiety to (a) a ketone group of one or more intermediates having the structure that may be defined by Formula A; or (b) a corresponding alcohol of the intermediate.