CAS: 626-95-9; 1,4-Pentanediol

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5-羟基-2-戊酮置于c18H21Brmnn3O3,Potassium Tert-Butylate,异丙醇体系中,化学反应 24.0H,以29%的收率获得产物1,4-戊二醇
参考文献:简单双齿mn-Nhc配合物催化的酮的高效,实用转移加氢.
标题:简单双齿mn-Nhc配合物催化的酮的高效,实用转移加氢.
摘要:催化还原含羰基化合物对于安全,可持续和经济地生产醇至关重要.在本文中,我们报告了由高效mn(i)-Nhc络合物催化的酮的有效转移加氢反应.mn-Nhc 1适用于低至75 Ppm的金属浓度,因此可以接近传统上为贵金属基系统保留的载荷.在这些低的mn浓度下,发现催化剂失活高度依赖于温度,并且在升高的反应温度下变得尤为突出.最终,了解失活途径可能有助于弥合ru和ir催化剂的活性/稳定性差距,从而切实可行地实现可持续的富含地球的锰配合物.
DOI:10.1002/cctc.201900882

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-4472568-A
优先权日:1981-11-12
标 题:Process for the preparation of polyamines from N-monoaryl-N',N'-dialkyl urea compounds and their use for the synthesis of polyurethanes
发明人：RASSHOFER WERNER; GROEGLER GERHARD
权利人:BAYER AG
摘要:This invention relates to an improved process for the preparation of aromatic polyamines containing urethane and/or biuret and/or urea and/or isocyanurate groups and preferably also ether groups by the hydrolysis of poly-N-monoaryl-N',N'-dialkyl urea compounds (1-aryl-3,3-dialkyl ureas). The ureas are obtained by the reaction of secondary aliphatic, cycloaliphatic or saturated heterocyclic amines with divalent to tetravalent isocyanate compounds containing isocyanate end groups attached to aromatic residues. The ureas correspond to the general formula: wherein R1, R2 denote alkyl or cycloalkyl groups, or together form a ring and A denotes a divalent to tetravalent residue attached to the ureas by aromatic groups. Hydrolysis is carried out in the presence of water and up to two equivalents of a base containing hydroxide ions and/or up to two equivalents of a compound containing tertiary amino groups, optionally in the presence of solvents. The use of the polyamines obtained by this process for the synthesis of polyurethanes is also described.

专利号:WO-2022259268-A1
优先权日:2021-06-11
标题 :Synthesis of zeolite nanosheets from mining waste
发明人：NEWALKAR ADITYA; DESHMUKH SURESH B
权利人:NEWALKAR ADITYA
摘要:The Synthesis of Zeolite nanosheets from mining waste without using any OSDA or chemical reagents during the secondary growthof zeolite nanosheets is disclosed. The produced Zeolitenanosheet may be a synthetic material.

专利号:US-11034664-B1
优先权日:2020-05-11
标题 :Synthesis of cyclic carbonate monomers
发明人：PARK NATHANIEL H; HEDRICK JAMES L; PIUNOVA VICTORIA A; ARRECHEA PEDRO; ERDMANN TIM
权利人:IBM
摘要:Techniques regarding the synthesis of cyclic carbonate monomers are provided. For example, one or more embodiments described herein can comprise a method, which can include cyclizing a functionalized diol monomer with N,N′-carbonyldiimidazole, wherein the cyclizing produces a cyclic carbonate monomer and an imidazole carbamate. The method can also include activating the imidazole carbamate with an acid, wherein the activating promotes cyclization of the imidazole carbamate into the cyclic carbonate monomer.

专利号:US-2023151394-A1
优先权日:2020-03-31
标题 :Biologic synthesis of diols from amino acids
发明人：ZENG AN-PING; LIU YONGFEI
权利人:TAIZHOU SIMPLU TECH CO LTD
摘要:A method for the enzymatically catalyzed synthesis of a diol from an amino acid includes enzymatically hydroxylating the amino acid, enzymatically deaminating the amino acid, the deamination resulting in the formation of an oxo group at the position of the amino group, enzymatically decarboxylating the amino acid, and enzymatically hydrogenating the oxo group resulting from the deamination reaction.

专利号:US-8779215-B2
优先权日:2008-10-16
标 题 :Methods and apparatus for synthesis of alcohols from syngas
发明人：KHARAS KARL
权利人:MAVERICK BIOFUELS INC; MAVERICK SYNFUELS INC
摘要:This invention provides a method for producing ethanol and 2-propanol from syngas, the method comprising: (a) converting syngas into methanol using a methanol-synthesis catalyst; (b) converting methanol into ethylene and propylene using a methanol-to-olefins catalyst; and (c) hydrating ethylene into ethanol and propylene into 2-propanol. As taught herein, the combined yield of the ethanol and the 2-propanol from biomass can be at least 100 gallons per dry ton biomass. In certain embodiments, the yield of ethanol is at least 100 gallons per dry ton biomass. In some embodiments, the yield of 2-propanol is at least 50 gallons per dry ton biomass.