2,3-Dihydrofuran-5-carboxaldehyde | 63493-93-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氢呋喃
• 英文名称: 2,3-Dihydrofuran-5-carboxaldehyde
• 英文别名: 4,5-dihydrofuran-2-carbaldehyde；2-formyl-4,5-dihydrofuran；2,3-dihydrofuran-5-carbaldehyde
• CAS: 63493-93-6
• 化学式: C₅H₆O₂
• 分子量: 98.1014
• InChiKey: AKEUNKGGNNAMQL-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  0.5
• 重原子数：
  7
• 可旋转键数：
  1
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.4
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2,3-Dihydrofuran-5-carboxaldehyde 在 S-α,α-双(3,5-二三氟甲基苯基)脯氨醇三甲基硅醚 、 sodium tetrahydroborate 、 四(三苯基膦)钯 、 苯甲酸 作用下， 以 1,4-二氧六环 、 乙醇 、 甲苯 为溶剂， 反应 100.83h， 生成 (3aR,8S,8aR)-6-bromo-8a-(hydroxymethyl)-5-phenyl-8-(trifluoromethyl)-3,3a,8,8a-tetrahydro-2H-furo[2,3-b]pyrrolizin-8-ol
  参考文献：
  名称：

  有机催化级联氮杂-迈克尔-羟醛反应不对称合成手性吡咯嗪基三杂环

  摘要：

  通过α-支链α,β-不饱和醛与2-（三氟乙酰基）吡咯的有机催化不对称级联氮杂-迈克尔-羟醛反应，获得了新型手性吡咯嗪基三杂环。通过采用这种合成策略，实现了高对映选择性（90-95% ee）和出色的非对映选择性（dr 高达 >20:1）。高度官能化的三氟甲基取代的级联产物具有三个连续的立体中心，其中包括两个手性四元中心。级联产物与两种不同芳基硼酸的化学选择性逐步 Suzuki 交叉偶联反应以良好的产率提供了基于手性吡咯嗪的三杂环，其中含有两个不同的芳基取代基。

  DOI：

  10.1002/ejoc.201301260
• 作为产物：
  描述：

  2,3-二氢呋喃 、 N,N-二甲基甲酰胺 在 叔丁基锂 作用下， 以 四氢呋喃 、 正戊烷 为溶剂， 以40%的产率得到2,3-Dihydrofuran-5-carboxaldehyde
  参考文献：
  名称：

  Relevance of Conformational Constraints to the Regioselective Lithiation of Aromatic Diethers. Application to the Convenient Construction of the DEF Tricyclic Subunit of the Austalides

  摘要：

  The lithiation of 29 and 30 is shown to occur at all three sites with a dissimilar kinetic preference. For the dihydrofuran, reaction at the proton labeled H-beta, operates predominantly; in the dihydropyran example, H-alpha is the favored site of deprotonation. These protons represent those that are the most deshielded in the respective H-1 NMR spectra. The same is true for 9 and 19, both of which undergo metalation adjacent to the ring oxygen. No crossover in regioselectivity is observed, presumably because the methoxy substituent is sterically precluded from rotating freely. Mixed complexes (dimers, etc.) or mixed aggregates in low equilibrium concentration are key to understanding the acidification phenomenon of ortho hydrogens. As a consequence of the dominance of regiocontrol by the ring oxygen in 9, a convenient means has been developed for elaboration of the tricyclic eastern sector of the austalide mycotoxins.

  DOI：

  10.1021/jo00087a018

文献信息

• Lead Generation: Sowing the Seeds for Future Success
  作者：Konrad H. Bleicher、Matthias Nettekoven、Jens-Uwe Peters、René Wyler

  DOI：10.2533/000942904777677542

  日期：——

  Lead generation and the associated hit-to-lead process are key strategic elements in modern pharmaceutical research, and most companies have implemented this concept. Efficient lead generation is one of the main attempts to reduce the high attrition rates observed along the drug discovery process by focussing on the early developmental phases. The level of integration of the lead generation activities within the discovery organization, the flexibility in assessing and implementing new chemistries and new technologies, the high-quality standards set for the identification of the best possible chemical lead series will ultimately determine the future success in discovering new medicines.

  引导生成和相关的从击中到引导的过程是现代制药研究中的关键战略元素，大多数公司已经实施了这个概念。高效的引导生成是减少药物发现过程中观察到的高流失率的主要尝试之一，重点放在早期开发阶段。引导生成活动在发现组织内的整合程度、评估和实施新化学物质和新技术的灵活性、为了确定最佳化学引导系列的高质量标准最终将决定在发现新药物方面的未来成功。
• Alkoxy and cyclic ether oxygens exhibit disparate capabilities for directing ortho lithiation
  作者：Leo A. Paquette、Matthias M. Schulze

  DOI：10.1016/s0040-4039(00)73670-7

  日期：1993.5

  Metalation of 4a and 4b with n-butyllithium under kinetically controlled conditions (C6H6, 20 °C or Et2O, TMEDA (2 equiv), 20 °C) leads to preferred deprotonation α to the heterocyclic ring.

  的金属化图4a和图4b与Ñ动力学控制条件下正丁基锂（C 6 H ^ 6，20℃或Et 2 O，TMEDA（2当量），20℃）导致优选的脱质子化α到杂环。
• Inhibitors of TNFalpha, PDE4 and B-RAF, compositions thereof and methods of use therewith
  申请人：McKenna M. Jeffrey

  公开号：US20080004271A1

  公开（公告）日：2008-01-03

  Provided herein are compounds having TNFα and/or PDE4 and/or B-RAF inhibitory activity, and compositions thereof. In particular, provided herein are compounds of the formula I: and pharmaceutically acceptable salts, solvates, hydrates, clathrates, stereoisomers, polymorphs and prodrugs thereof, wherein Ar, R 1 , R 2 , R 3 , R 4 , n and Z are as described herein. Further provided herein are methods for treating or preventing various diseases and disorders by administering to a patient one or more TNFα and/or PDE4 and/or B-RAF inhibitors. In particular, provided herein are methods for preventing or treating cancer, inflammatory disorders, cognition and memory disorders and autoimmune disorders, or one or more symptoms thereof by administering to a patient one or more TNFα and/or PDE4 and/or B-RAF inhibitors.

  本文提供具有TNFα和/或PDE4和/或B-RAF抑制活性的化合物及其组合物。特别地，本文提供了式I的化合物：以及其药学上可接受的盐、溶剂化合物、水合物、包合物、立体异构体、多晶形和前药，其中Ar、R1、R2、R3、R4、n和Z如本文所述。此外，本文提供了通过向患者给予一种或多种TNFα和/或PDE4和/或B-RAF抑制剂来治疗或预防各种疾病和疾病的方法。特别地，本文提供了通过向患者给予一种或多种TNFα和/或PDE4和/或B-RAF抑制剂来预防或治疗癌症、炎症性疾病、认知和记忆障碍和自身免疫性疾病或其一种或多种症状的方法。
• Synthesis and some properties of 4,5-dihydrofurfural
  作者：A. V. Lozanova、A. A. Surkova、A. M. Moiseenkov

  DOI：10.1007/bf00958077

  日期：1989.3
• 1,3,5-Tris(hydrogensulfato) Benzene: A New and Efficient Catalyst for Synthesis of 4,4′-(arylmethylene)bis(1H-pyrazol-5-ol) Derivatives
  作者：Zahed KARIMI-JABERI、Baharak POOLADIAN、Masoud MORADI、Ehsan GHASEMI

  DOI：10.1016/s1872-2067(11)60477-4

  日期：2012.11

  1,3,5-Tris(hydrogensulfato) benzene (THSB) was easily prepared by the reaction between phloroglucinol and chlorosulfonic acid in dichloromethane at room temperature. This compound was then used as an efficient catalyst for the synthesis of 4,4'-(arylmethylene)bis(1H-pyrazol-5-ols) through the condensation reactions of 1-phenyl-3-methylpyrazol-5-one with several different aromatic aldehydes in ethanol at 75 degrees C. The present methodology offers several advantages over existing methodologies, such as excellent yields, simple procedure, easy work-up and ecofriendly reaction conditions.