CAS: 547-65-9; 3-Methylenedihydrofuran-2(3H)-One

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CAS号201230-82-2 carbon monoxide | CAS号927-74-2 3-丁炔-1-醇 | CAS号61541-20-6 methyl 4-hydrox... | CAS号42023-17-6 3-[(dimethylami... | CAS号3140-73-6 2-氯-4,6-二甲氧基-1,... | CAS号124-40-3 二甲胺 | CAS号54509-73-8 ethene | CAS号79-10-7 丙烯酸 | CAS号109-94-4 甲酸乙酯 | CAS号50-00-0 甲醛 | CAS号22122-36-7 3-甲基-2-(5H)-呋喃酮 | CAS号5837-78-5 惕各酸乙酯 | CAS号126812-13-3 methyl 3-(2-oxo... | CAS号1530-62-7 2(3H)-Furanone,... | CAS号13423-15-9 3-甲基四氢呋喃 | CAS号1679-47-6 ALPHA-甲基-GAMMA-丁内酯 | CAS号55341-13-4 3-methyl-2-oxo-... | CAS号119102-90-8 7-苄基-2-噁-7-氮杂螺[... | CAS号76220-95-6 3-Methylene-2-P...

α-Hydroxymethyl-γ-Butyrolactone置于aluminum Oxide体系中,化学反应生成 2-甲烯基丁内酯
参考文献:Lactone Derivatives And Method Of Making
标题:Lactone Derivatives And Method Of Making

专利信息

专利号:WO-2025053792-A1
优先权日:2023-09-06
标题:Collective synthesis of phantomolin family through total synthesis of the sesquiterpene lactone molephantin
发明人：CHIBA SHUNSUKE; PATOURET REMI HENRI LOUIS; LI HOI YEUNG; LAI SOAK KUAN
权利人:UNIV NANYANG TECH
摘要:Disclosed herein are processes to generate an intermediate in the total synthesis of (+)- molephantin or a derivative thereof, and a total synthesis of (+)-molephantin or a derivative thereof. Also disclosed herein are methods of forming a compound of formula XIV and of forming a compound of formula XV, wherein compound of formula XIV and compound of formula XV are as defined in the description.

专利号:US-11629223-B2
优先权日:2018-01-11
标 题:Synthesis of polymers from cyclic diolides
发明人：CHEN EUGENE Y; TANG XIAOYAN
权利人:UNIV COLORADO STATE RES FOUND
摘要:Biodegradable polymers with advantageous physical and chemical properties are described, as well as methods for making such polymers. In one embodiment, a new chemical synthesis route to technologically important biodegradable poly(3-hydroxybutyrate) (P3HB) with high isotacticity and molecular weight required for a practical use is described. The new route can utilize racemic eight-membered cyclic diolide (rac-DL), meso-DL, or a rac-DL and meso-DL mixture, derived from bio-sourced dimethyl succinate, and enantiomeric (R,R)-DL and (S,S)-DL, optically resolved by metal-based catalysts. With a stereoselective racemic molecular catalyst, the ROP of rac-DL under ambient conditions produces rapidly P3HB with essentially perfect isotacticity ([mm]>99%), high crystallinity and melting temperature (T m =171° C.), as well as high molecular weight and low dispersity (M n =1.54×10 5 g/mol, Ã?=1.01).

专利号:US-2024425890-A1
优先权日:2022-02-11
标 题:Process for the synthesis of alpha-methylene-gamma-butyrolactone
发明人：TADEN ANDREAS; BECK HORST; MYRTOLLARI KAMELA; KOURIST ROBERT; NIGL ANDREA
权利人:HENKEL AG & CO KGAA
摘要:The present application provides a process for the preparation of α-methylene-γ-butyrolactone, said process comprising the steps of:a) acetylating the C1-hydroxyl group of isoprenol to yield isoprenyl acetate;b) forming 4-acetoxy-2-methylene-butan-1-ol from said isoprenyl acetate by whole cell biotransformation, said step comprising:i) contacting a cell (CB) with a culture medium containing said isoprenyl acetate or with a culture medium contiguous with an organic phase containing said isoprenyl acetate under conditions that enable the cell to form 4-acetoxy-2-methylene-butan-1-ol from isoprenyl acetate; and,ii) optionally isolating the resultant 4-acetoxy-2-methylene-butan-1-ol, wherein said cell (CB) exhibits activity of at least one alkane monooxygenase enzyme which catalyzes the formation of 4-acetoxy-2-methylene-butan-1-ol from isoprenyl acetate;c) oxidizing said 4-acetoxy-2-methylene-butan-1-ol to yield 4-acetoxy-2-methylene butyric acid; and,d) converting said 4-acetoxy-2-methylene butyric acid to α-methylene-γ-butyrolactone by hydroxylysis to γ-hydroxy-α-methylenebutyric acid and subsequent cyclization of said γ-hydroxy-α-methylenebutyric acid.

专利号:US-7164033-B2
优先权日:2004-07-27
标题 :Gas phase synthesis of methylene lactones using novel catalyst
发明人：HUTCHENSON KEITH W; KOURTAKIS KOSTANTINOS; MANZER LEO ERNST
权利人:DU PONT
摘要:Process for converting certain lactones to their alpha-methylene substituted forms that not only exhibits high initial activity (conversion), but also maintains a high level of activity with time on stream.

专利号:US-7348442-B2
优先权日:2004-10-18
标题 :Gas phase synthesis of methylene lactones using catalysts derived from hydrotalcite precursors
发明人：MANZER LEO ERNEST; KOURTAKIS KOSTANTINOS
权利人:DU PONT
摘要:Process for converting certain lactones to their alpha-methylene substituted forms using (i) a catalyst derived from a hydrotalcite or (ii) a composite catalyst comprising the hydrotalcite-derived catalyst into which at least one of lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium has been incorporated.

专利号:EP-2647639-A1
优先权日:2012-04-06
标题:ß-boration of alkene and alkyne intermediates
权利人:LEK PHARMACEUTICALS
摘要:The present invention relates to the field of organic chemistry, and in particular to the preparation of β-borated compounds. These β-borated compounds can be used as intermediates in the synthesis of pharmaceutically active agents such as Sitagliptin.