CAS: 37112-31-5; (1S,5R)-6,8-Dioxabicyclo[3.2.1]Oct-2-En-4-One

相似化合物

115509-13-2 281676-64-0 1212181-78-6

上下游产品

1,6-Anhydro-3,4-Dideoxy-β-D-Threo-Hex-3-Enopyranose 50705-28-7
1,6-Anhydro-3,4-Dideoxy-β-D-Erythro-Hex-3-Enopyranose 58394-28-8

📜1,6-脱水-β-D-葡萄糖置于1-丙磺酸体系中,用 四氢呋喃 用作溶剂,209.84 °C,6.9 Mpa 条件下,反应生成左旋葡萄糖酮
参考文献:Catalytic Dehydration Of Levoglucosan To Levoglucosenone Using Brønsted Solid Acid Catalysts In Tetrahydrofuran
标题:Catalytic Dehydration Of Levoglucosan To Levoglucosenone Using Brønsted Solid Acid Catalysts In Tetrahydrofuran
摘要:我们使用丙基磺酸功能化的硅胶从乙基葡萄糖苷中生产了59%选择性,转化率为100%.
Doi:10.1039/c9Gc01526D

专利信息

专利号:US-2024368099-A1
优先权日:2022-01-18
标 题:Methods for the synthesis of di(hydroxymethyl)tetrahydrofuran and its application in polyesters and polyurethanes
发明人：SPIEGELBERG BRIAN; BRANDT ADRIAN; BECK HORST; KUX ALEXANDER; TIN SERGEY; DE VRIES JOHANNES GERARDUS
权利人:HENKEL AG & CO KGAA
摘要:The present invention relates to the synthesis of di(hydroxymethyl)tetrahydrofuran (DHMTHF) and the preparation of trans-enriched mixtures of DHMTHF. The invention further refers to polyester polyols which are obtained by reaction of cis/trans DHMTHF mixtures with a dicarboxylic acid. The invention further relates to polyurethanes and compositions containing a polyester polyol comprising DHMTHF, in particular to such polyurethane-containing (adhesive) compositions.

专利号:US-9873612-B2
优先权日:2013-10-29
标 题:Catalytic formation of carbon monoxide (CO) and hydrogen (H2) from biomass
发明人：NEUMANN RONNY; SARMA Bidyut-Bikash
权利人:YEDA RES & DEV; YEDA RES & DEV
摘要:The present invention relates to methods of preparing carbon monoxide (CO) and hydrogen (H 2 ) by reacting biomass, a biomass component (e.g., lignin, ligno-cellulose, cellulose, hemiceullose or combination thereof) or a carbohydrate from any source with a polyoxometalate catalyst such as H 5 PV 2 Mo 10 O 40 , or solvates thereof, in the presence of a concentrated acid, under conditions sufficient to yield carbon monoxide (CO); followed by electrochemical release of hydrogen (H 2 ). The carbon monoxide (CO) and hydrogen (H 2 ) may be combined in any desired proportion to yield synthesis gas (Syngas). The present invention further relates to methods for preparing H 2 , CO and formic acid/formaldehyde from biomass, a biomass component and/or from carbohydrates.

专利号:US-10364265-B1
优先权日:2015-12-15
标题:Anhydrosugar synthesis
发明人：CHEN LI; WONG MICHAEL S; ZHANG ZONGCHAO
权利人:WILLIAM MARSH RICE UNIVERISTY; UNIV RICE WILLIAM M
摘要:Improved methods of making anhydrosugars by pyrolysis of a substrate sugar to remove at least one water molecule thereby producing a desired anhydrosugar and side products, the improvement being either 1) protecting one hydroxyl group of the substrate sugar before pyrolysis; or (2) pretreating the substrate sugar with a metal salt and optional acid before pyrolysis, wherein lower amounts of said side products are produced by said improved method.

专利号:US-5457192-A
优先权日:1991-02-21
标题 :Method of manufacturing D-allosan
发明人：MATSUMOTO KATSUYA; EBATA TAKASHI; MATSUSHITA HAJIME
权利人:JAPAN TOBACCO INC
摘要:PCT No. PCT/JP92/00170 Sec. 371 Date Oct. 21, 1992 Sec. 102(e) Date Oct. 21, 1992 PCT Filed Feb. 19, 1992 PCT Pub. No. WO92/14744 PCT Pub. Date Sep. 3, 1992.The carbonyl group at the 2-position of levoglucosenone is reduced to obtain a hydroxyl group having a beta -configuration. The hydroxyl group having a beta -configuration is reversed to an alpha -configuration, and hydroxyl groups are added at the 3- and 4-positions in a cis- alpha form. Finally, the protective group of the hydroxyl group at the 2-position is eliminated. The reduction of the carbonyl group at the 2-position can be performed such that the levoglucosenone is reacted with aluminum lithium hydride or sodium boron hydride in an appropriate solvent. Reversion of the hydroxyl group having a beta -configuration can be performed by the Mitsunobu method or a method having a mesylation step and a step using cesium acetate. The addition of the hydroxyl groups to the 3-and 4-positions in the cis form can be performed by oxidizing the double bond across the 3- and 4-positions with an appropriate oxidizing agent. The elimination of the protective group of the hydroxyl group at the 2-position can be performed under basic conditions in accordance with normal methods. According to the method of the present invention, D-allosan can be obtained stereoselectively in high yield via a smaller number of steps than that of the conventional synthesis method.

专利号:BR-102020021669-A2
优先权日:2020-10-22
标 题:Process of synthesis of long-chain polyols from biomass and compounds obtained

专利号:JP-2025504449-A
优先权日:2022-01-18
标题 :Synthesis of di(hydroxymethyl)tetrahydrofuran and its application in polyesters and polyurethanes.