CAS: 10097-02-6; 2,2-Bis(Hydroxymethyl)Butyric Acid

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2-Ethyl-3-Hydroxypropanal置于双氧水,三乙胺体系中,化学反应生成2,2-二羟甲基丁酸
参考文献:从同步加速器辐射粉末衍射数据确定单斜2,2-二羟基甲基丁酸的从头算结构:直接方法和蒙特卡罗方法的组合使用.
标题:从同步加速器辐射粉末衍射数据确定单斜2,2-二羟基甲基丁酸的从头算结构:直接方法和蒙特卡罗方法的组合使用.
摘要:从一开始就从同步辐射粉末粉末衍射数据确定了单斜形式的2,2-二羟基甲基丁酸(c(6)h(12)o(4))的晶体结构.首先通过直接方法衍生出两个o和五个c原子.通过蒙特卡罗方法发现了两个缺失的o原子和一个c原子,而没有对其相对位置施加约束.这些非氢原子的位置和各向同性位移参数通过rietveld方法进行了改进.分子通过氢键连接,形成平行于(010)平面的片状网络.事实证明,蒙特卡洛方法是寻找部分溶解的结构中缺失原子的有力工具.
Doi:10.1107/s0108768100018905

专利信息

专利号:WO-9900440-A1
优先权日:1997-06-26
标 题:Synthesis of a dendritic polyalcohol
发明人：IHRE HENRIK; HULT ANDERS
权利人:PERSTORP AB; IHRE HENRIK; HULT ANDERS
摘要:A process for a double stage convergent synthesis of a polymeric polyalcohol substantially and preferably built up from polyester units and composed of a monomeric or polymeric core to which at least one hyperbranched dendritic branch (dendron) consisting of a number of branching generations is added. The branching generations comprise a polymeric or monomeric branching chain extender having three reactive functions of which two are hydroxyl groups and one is a carboxyl group. The two hydroxyl groups of the branching chain extender is in a first step ketal protected by reacting said two hydroxyl groups with a ketal. A second step includes protection of the carboxyl group of said branching chain extender. The ketal protected branching chain extender and the carboxyl protected chain extender are then employed for repeated addition in a number of step yielding a predetermined number of branching generations. The thus synthesized dendron is finally added to a core having reactive hydroxyl or epoxide groups and the ketal protected hydroxyl groups are optionally deprotected.

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-6211329-B1
优先权日:1997-06-26
标题:Process for preparation of a dendritic polyol
发明人：REHNBERG NICOLA; PETTERSSON BO; ANNBY ULF; MALMBERG MATS
权利人:PERSTORP AB
摘要:A process for synthesis of a polymeric polyalcohol substantially and preferably built up form polyester units and composed of a monomeric or polymeric initiator molecule to which at least one dentritic branch (dendron) consisting of a number of branching generations is added. The branching generations comprise a polymericor monomeric branching chain extender having three reactive functions of which two are hydroxyl groups. The two hydroxyl groups of the ranching chain extender is acetal protected by reaction between said two hydroxyl groups and an acetal-forming carbonyl compound, preferably an aldehyde. The acetal protected branching chain extender is then employed for addition to the initiator molecule of a first branching generation followed by an optional deprotection of the hydroxyl groups by decomposition of acetals and for addition in repeated steps of further branching generations. Additions of branching generations individually employ an acetal protected branching chain extender synthesized from the same or a different branching chain extender and/or acetal-forming carbonyl compound and addition of a branching generation is optionally followed by addition of a spacing generation.

专利号:US-6174956-B1
优先权日:1995-06-02
标题 :Synthesis of condensation polymers in densified fluids
发明人：KERSCHNER JUDITH LYNNE; JURELLER SHARON HARRIOTT; THOMAIDES JOHN SOCRATES; HUMPHREYS ROBERT WILLIAM; IOVINE CARMINE PHILLIP
权利人:NAT STARCH CHEM INVEST
摘要:A polyurethane polymer and method of preparing it is described. The process requires the combination of a soluble polyol with a di- or polyisocyanate under densified fluid conditions. The process to prepare a waterborne polyurethane involves the utilization of a polyol containing ionic or latent ionic groups which must undergo preneutralization before combining with the di- or polyisocyanate under densified fluid conditions. The resulting polyurethane is substantially free of an organic solvent.

专利号:US-2024279264-A1
优先权日:2021-10-22
标题:Catalytic polymerization and depolymerization of 1,6-anhydrosugars
发明人：NIU JIA; WU LIANQIAN
权利人:THE TRUSTEES OF BOSTON COLLEGE
摘要:Methods for controlled synthesis and chemical recycling of stereoregular polysaccharides via polymerization of biomass-derived anhydrosugars are provided. The anhydrosugars react with an initiator in the presence of a synergy of a catalyst and the initiator providing the polysaccharides with high chain end fidelity and an excellent molecular weight distribution in a controlled manner, which allows for the preparation of polymeric systems with well-defined architectures. The polysaccharides obtained by such methods can be substantially converted to the start monomers in the present of a catalyst and can be used for biomedicine.

专利号:WO-2023137518-A1
优先权日:2022-01-21
标题 :Platinum complexes
发明人：ALDRICH-WRIGHT JANICE; GORDON CHRISTOPHER; DEO KRISHANT M; KHOURY ALEEN; MCGHIE BRONDWYN; APUTEN ANGELICO; PLATTEN-MENTI MARIA; RASHID FATIN; JURISINEC ASHLEY; SOLIMAN SARAH
权利人:WESTERN SYDNEY UNIV
摘要:The present disclosure relates to platinum complexes, and in particular platinum(II) and platinum(IV) complexes. The present disclosure also relates to synthesis of the platinum complexes, and to intermediates for the synthesis of the platinum complexes. The present disclosure also relates to methods and use of the platinum complexes for treating cancer.