CAS: 502-97-6; 1,4-Dioxane-2,5-Dione

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CAS号79-14-1 羟基乙酸 | CAS号111-27-3 正己醇 | CAS号71-36-3 正丁醇 | CAS号71-41-0 正戊醇 | CAS号111-70-6 正庚醇 | CAS号3926-62-3 氯乙酸钠 | CAS号79-11-8 氯乙酸 | CAS号67-56-1 甲醇 | CAS号71-23-8 正丙醇 | CAS号64-17-5 乙醇 | CAS号39096-01-0 N,N-二乙基-2-羟基乙酰胺 | CAS号107-21-1 乙二醇 | CAS号138-86-3 柠檬烯;双戊烯 | CAS号96-35-5 乙醇酸甲酯 | CAS号623-50-7 乙醇酸乙酯 | CAS号7397-62-8 羟基乙酸丁酯 | CAS号14658-93-6 2-羟基-N,N-二甲基乙酰胺 | CAS号79-14-1 羟基乙酸 | CAS号90357-58-7 propyl 2-hydrox... | CAS号4746-61-6 2-羟基-N-苯基乙酰胺

Chloroacetyl Glycolic Acid置于sodium Carbonate体系中,用75%的收率获得产物1,4-二氧杂环-2,5-己二酮
参考文献:乙交酯的合成方法
标题:乙交酯的合成方法
摘要:本发明公开了一种乙交酯的合成方法,包括如下步骤:取氯乙酰氯和加热熔融的乙醇酸置于反应器中,加入碳酸盐,反应,得到到氯乙酰乙醇酸;将氯乙酰乙醇酸和碳酸盐混合,在搅拌下,减压蒸馏,蒸出乙交酯粗产物;反应式为:本发明所采用的原料氯乙酰氯,乙醇酸,碳酸盐可以在市场上大批量购买,在合成过程中没有大量的酸性废水产生,大大降低了对环境的污染.本发明的方法都没有使用有机溶剂,既降低了成本又避免的环境的污染,减少了对工作人员的身体危害.本发明中采用的氯乙酰氯价格低廉,比传统工艺中全部使用乙醇酸在生产成本上有极大的降低,同时不需要添加催化剂,使生产操作更加简单.乙交酯的产率有相应的提高.

专利信息

专利号:US-12146136-B2
优先权日:2020-03-26
标题:Synthesis of modified oligonucleotides with increased stability
发明人：KHVOROVA ANASTASIA; ROUX LOÃ?C MAURICE RENÉ JEAN; YAMADA KEN
权利人:UNIV MASSACHUSETTS
摘要:This disclosure relates to the synthesis of novel modified oligonucleotides. The synthesis of novel phosphoramidites are also provided.

专利号:WO-2009033269-A1
优先权日:2007-09-11
标 题 :Novel polysaccharide immunogens from alloiococcus otitidis and synthesis of a glycoconjugate vaccine thereof
发明人：MONTEIRO MARIO ARTUR; ARAR SARIF; HARIMAYA ATSUSHI
权利人:UNIV GUELPH; MONTEIRO MARIO ARTUR; ARAR SARIF; HARIMAYA ATSUSHI
摘要:The application relates to Alloiococcus otitidis cell surface polysaccharides, compositions comprising Alloiococcus otitidis cell surface polysaccharides, synthesis of a glycoconjugate vaccine and includes kits, methods and uses thereof.

专利号:US-7504524-B2
优先权日:2004-07-26
标题:Method for synthesis of 2,5-dioxane-1,4-diones
发明人：BOURISSOU DIDIER; MARTIN-VACA BLANCA; BEN FREDERIC; GRAULLIER MAGALIE; CHERIF-CHEIKH ROLAND; MONTES MARTIN
权利人:SOD CONSEILS RECH APPLIC
摘要:The invention relates to a novel method for the synthesis of 2,5-dioxane-1,4-diones having formula (I), comprising the oxidation of the ketone function of a cyclic compound having formula (II), wherein R 1 , R 2 , R 3 and R 4 independently represent the hydrogen atom, halo, (C 2 -C 6 ) alkenyl, (C 3 -C 7 )cycloalkyl, cyclohexenyl and a radical having formula —(CH 2 ) m —V—W.

专利号:US-5633342-A
优先权日:1995-10-27
标题:Method for the synthesis of environmentally degradable block copolymers
发明人：VERSER DAN W; SCHILLING KEVIN H; CHEN XIAOMAO
权利人:CHRONOPOL INC
摘要:A method is provided for the synthesis of environmentally degradable block copolymers which includes the sequential polymerization of polymer-forming materials in the presence of one or more polymerization reaction accelerants and catalysts. The accelerants are a class of hydrogen-labile compounds which act as polymerization initiators and accelerate the polymerization rate significantly. The environmentally degradable block copolymers produced include those comprising segments of polymers of alkylene oxides, trimethylene carbonates, lactones and cyclic esters of hydroxycarboxylic acids.

专利号:WO-2024121087-A1
优先权日:2022-12-07
标 题 :Process for the synthesis of polyesterols by ring-opening co-polymerisation of gamma-butyrolactone with other lactones
发明人：SCHAUB THOMAS; NICOLAS MATHIEU; FALCONNET ALBAN; HASHMI A STEPHEN K; KONRADI RUPERT; RODEWALD DIETER; BRUCHMANN BERND
权利人:BASF SE
摘要:Described are a process for the synthesis of polyesterols by ring-opening co-polymerisation of γ-butyrolactone with other lactones, the use of a kit comprising one or more bases comprising an alkaline metal cation and one or more alcohols in said process, and polyesterols obtainable by said process.

专利号:US-6498229-B1
优先权日:2001-09-05
标题:Direct synthesis of segmented glycolide copolymers and crystalline materials therefrom
发明人：SHALABY SHALABY W
权利人:POLY MED INC
摘要:The present invention is directed to a method for the direct, one-step synthesis of crystalline segmented glycolide copolymers having less than 80 percent glycolide-based sequences in the copolyester chain. The copolyester chain can also be formed using a polyether glycol as the initiator for the ring-opening copolymerization of glycolide and other cyclic monomers to form highly hydrophilic materials.