2-乙氧基呋喃 | 5809-07-4

• 分子结构分类: 有机化合物 - 有机氧化合物
• 中文名称: 2-乙氧基呋喃
• 英文名称: 2-ethoxyfuran
• CAS: 5809-07-4
• 化学式: C₆H₈O₂
• 分子量: 112.128
• InChiKey: FHUFFVIITDISHQ-UHFFFAOYSA-N

物化性质

• 沸点：
  125.5°C (estimate)
• 密度：
  0.9849

计算性质

• 辛醇/水分配系数(LogP)：
  1.8
• 重原子数：
  8
• 可旋转键数：
  2
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.33
• 拓扑面积：
  22.4
• 氢给体数：
  0
• 氢受体数：
  2

安全信息

• 海关编码：
  2932190090

反应信息

• 作为反应物：
  描述：

  5-chloro-2-benzyl-3(2H)-isothiazolone 1-oxide 、 2-乙氧基呋喃 以afforded 3.05 g (40%) of 2-benzyl-4-ethoxy-7-hydroxybenzisothiazol-3-one-1-oxide, 5.7 g of which的产率得到2-Benzyl-4-ethoxy-7-hydroxybenzisothiazol-3-one-1-oxide
  参考文献：
  名称：

  2-saccharinylmethyl aryl and arloxy acetates useful as proteolytic

  摘要：

  4-R.sup.4 -R.sup.5 -2-Saccharinylmethyl芳基和芳氧基乙酸酯，可用于治疗退行性疾病，通过在酸受体存在下将4-R.sup.4 -R.sup.5 -2-卤代甲基糖精与芳基或芳氧基乙酸反应制备。

  公开号：

  US05783589A1
• 作为产物：
  描述：

  5-乙氧基-2-糠酸 在 喹啉 、 铜 作用下， 生成 2-乙氧基呋喃
  参考文献：
  名称：

  Simple Furan Ethers. II: 2-Alkoxy- and 2-Aryloxy-furans

  摘要：

  DOI：

  10.1021/jo01111a008

文献信息

• Process for production of amines
  申请人：Terada Masahiro

  公开号：US20070142639A1

  公开（公告）日：2007-06-21

  A process for producing an amine which is characterized by reacting an imine with a nucleophilic compound (except a trialkylsilyl vinyl ether) in the presence of a phosphoric acid derivative represented by the formula (1): wherein A 1 represents a spacer; X 1 and X 2 represent each independently a divalent nonmetal atom or a divalent nonmetal atomic group; and Y 1 is oxygen or sulfur. The invention provides a process by which amines (particularly optically active amines) useful as intermediates of medicines, agricultural chemicals, or the like can be produced without special post-treatment in high yield at high optical purity; and phosphoric acid derivatives (particularly optically active phosphoric acid derivatives) useful in the production of the amines.

  一种生产胺的方法，其特征在于在式（1）所代表的磷酸衍生物存在下，将亚胺与一种亲核化合物（三烷基硅基乙烯醚除外）反应： 其中A1代表一个间隔物；X1和X2分别独立表示二价非金属原子或二价非金属原子团；Y1为氧或硫。该发明提供了一种方法，通过该方法，可以在高光学纯度下高产率地生产用作药品、农药等中间体的胺（特别是光学活性胺），而无需进行特殊的后处理；以及用于生产这些胺的磷酸衍生物（特别是光学活性磷酸衍生物）。
• BIS-PHOSPHATE COMPOUND AND ASYMMETRIC REACTION USING THE SAME
  申请人：Terada Masahiro

  公开号：US20120330038A1

  公开（公告）日：2012-12-27

  A novel bis-phosphate compound is provided which can be applied to a wide range of reactive substrates and reactions as an asymmetric reaction catalyst and can realize an asymmetric reaction affording a high yield and a high enantiomeric excess. The bis-phosphate compound has a tetraaryl skeleton represented by General Formula (1). In an asymmetric reaction, an amidodiene and an unsaturated aldehyde compound are reacted with each other in the presence of the optically active bis-phosphate compound to give an optically active amidoaldehyde. The invention allows a reaction such as an asymmetric Diels-Alder reaction to proceed efficiently, which has been difficult with conventional mono-phosphate compounds. Thus, the invention enables an industrially feasible method for the production of optically active amidoaldehydes, optically active β-amino acid derivatives, optically active diamine compounds, optically active pyrrolidine derivatives and optically active dihydropyran derivatives which are useful as products such as medicines, agricultural chemicals and chemical products as well as synthesis intermediates for such products.

  提供了一种新型的双磷酸盐化合物，可应用于广泛的反应底物和反应作为不对称反应催化剂，并且可以实现产率高和对映体过量高的不对称反应。该双磷酸盐化合物具有由通用式（1）表示的四芳基骨架。在不对称反应中，存在光学活性的双磷酸盐化合物的情况下，通过使酰胺二烯和不饱和醛化合物相互反应，得到光学活性的酰胺醛。该发明使得像不对称Diels-Alder反应这样的反应能够高效进行，而传统的单磷酸盐化合物很难实现。因此，该发明实现了一种工业上可行的方法，用于生产用作药品、农药和化工产品以及用于这些产品的合成中间体的光学活性酰胺醛、光学活性β-氨基酸衍生物、光学活性二胺化合物、光学活性吡咯烷衍生物和光学活性二氢吡喃衍生物。
• [EN] A PROCESS FOR SYNTHESIZING DIOL (VIII)-AN INTERMEDIATE OF MONTELUKAST SODIUM<br/>[FR] PROCEDE POUR SYNTHETISER UN DIOL (VIII), INTERMEDIAIRE DU SODIUM DE MONTELUKAST
  申请人：MOREPEN LAB LTD

  公开号：WO2006021974A1

  公开（公告）日：2006-03-02

  A process comprises preparing benzaldehyde of formula I in a conventional manner, reacting the said benzaldehyde I with Grignard reagent in water miscible etheral solvent to precipitate the alcohol of formula (II) by addition of ammonium salt and water followed by isolating the alcohol thus precipitated by any known methods and then oxidizing directly under 'Swern's conditions' to get a ketone of formula m, enolizing the said ketone in presence of a mild base such as alkali metal alkoxide and then reacting it with dialkyl carbonate under conditions effective to yield a β- ketoester of formula IV, benzylating the said β-ketoester so obtained in the preceding step to form the benzoate of formula V in presence of mild inorganic base followed by decarboxylating the said benzoate to a mixture of a ketoester of formula VI and its corresponding acid of formula VIA in the presence of acidic conditions, alkylating the acid VIA present in the mixture in the preceding step to obtain ketoester of formula VI and purifying it if so desired, asymmetrically reducing the ketoester of formula VI, to a chiral alcohol of formula VII using (-) diisopinocamphenylchloroborane (-DIPC1) in presence of less than 4 times v/w aprotic solvent and optionally in presence of Lewis base with respect to the said ketoester of formula VI, treating the said chiral alcohol VII with cerium halo salt, and alkylmagnesium halide followed by isolating the title compound using hyflow supercel and ammonium chloride to get the intermediate diol of formula VIII. Atemately, the said alcohol to Heck coupling with methyl-2-iodobenzoate in presence of Lewis base, acetonitrile, and palladium acetate to yield ketoester (VI), which is converted to diol (VIII) as described herein above.

  该过程包括以传统方式制备化学式I的苯甲醛，将所述苯甲醛I与格氏试剂在水溶性醚溶剂中反应，通过加入铵盐和水使醇II沉淀，随后通过任何已知方法分离沉淀的醇，然后在“Swern条件”下直接氧化以得到化学式m的酮，使所述酮在存在弱碱（如碱金属碱）的情况下烯醇化，然后在条件下与二烷基碳酸酯反应以产生化学式IV的β-酮酯，将在前一步骤中获得的β-酮酯苄化以在温和无机碱存在下形成化学式V的苯甲酸酯，随后在酸性条件下将所述苯甲酸酯脱羧为化学式VI的酮酯和其对应酸化学式VIA的混合物，将在前一步骤中存在的酸VIA烷化以获得化学式VI的酮酯，并在必要时纯化，将化学式VI的酮酯不对称还原为手性醇化学式VII，使用(-)二异萜基氯硼烷(-DIPC1)在少于4倍体积/重量的无极性溶剂和可能在存在于所述化学式VI的酮酯相对于Lewis碱的情况下，用铈卤盐和烷基镁卤化物处理所述手性醇VII，随后使用hyflow supercel和氯化铵分离标题化合物以获得化学式VIII的中间二醇。或者，将所述醇与甲基-2-碘苯酸甲酯在Lewis碱、乙腈和乙酸钯存在下进行Heck偶联反应，得到酮酯(VI)，然后将其转化为所述化学式VIII的二醇，如上所述。
• Copper(I) halide catalysed synthesis of alkyl aryl and alkyl heteroaryl ethers
  作者：Menno A. Keegstra、Theo H.A. Peters、Lambert Brandsma

  DOI：10.1016/s0040-4020(01)88501-x

  日期：1992.1

  A number of alkyl aryl and alkyl heteroaryl ethers have been prepared from (hetero) aryl halides (mainly bromides) and sodium alkoxides, using copper(I)bromide as a catalyst. The influence of the main solvent, the halogen atom, reaction temperature and the presence of oxygen upon the rate and selectivity has been studied. Furthermore the decomposition of the catalyst and the reduction of the aryl halide

  使用溴化铜（I），由（杂）芳基卤化物（主要是溴化物）和醇钠制备了许多烷基芳基和烷基杂芳基醚。研究了主要溶剂，卤素原子，反应温度和氧的存在对反应速率和选择性的影响。此外，还研究了催化剂的分解和芳基卤化物的还原。
• Enantioselective aza-Friedel–Crafts reaction of furan with α-ketimino esters induced by a conjugated double hydrogen bond network of chiral bis(phosphoric acid) catalysts
  作者：Manabu Hatano、Haruka Okamoto、Taro Kawakami、Kohei Toh、Hidefumi Nakatsuji、Akira Sakakura、Kazuaki Ishihara

  DOI：10.1039/c8sc02290a

  日期：——

  Chiral C2- and C1-symmetric BINOL-derived bis(phosphoric acid) catalysts, which have OP(O)(OH)2/OP(O)(OH)(OR) moieties at the 2,2′-positions, were developed and used for the enantioselective aza-Friedel–Crafts reaction of 2-methoxyfuran with α-ketimino esters for the first time. The intramolecular conjugated double hydrogen bond network is a key to increasing the Brønsted acidity and preventing deactivation

  手性C 2 - 和C 1 - 对称 BINOL 衍生的双磷酸催化剂，其具有 OP( O)(OH) 2 /OP( 2,2′位上的O)(OH)(OR)部分首次被开发并用于2-甲氧基呋喃与α-酮亚氨基酯的对映选择性氮杂-弗里德尔-克来福特反应。分子内共轭双氢键网络是提高布朗斯台德酸度和防止催化剂失活的关键。具有手性季碳中心的高度功能化的α-氨基酸衍生物可以转化为多功能光学活性N-和O-杂环以及α-芳基取代的丝氨酸。