2-benzyl-4-methyl-5-ethoxy-1,3-oxazole | 68484-91-3

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 2-benzyl-4-methyl-5-ethoxy-1,3-oxazole
• 英文别名: 2-benzyl-5-ethoxy-4-methyl-oxazole；2-benzyl-5-ethoxy-4-methyloxazole；5-ethoxy-2-benzyl-4-methyl-oxazole；5-Aethoxy-2-benzyl-4-methyl-oxazol；2-benzyl-4-methyl-5-ethoxy-oxazole；2-Benzyl-4-methyl-5-ethoxyoxazole；2-benzyl-5-ethoxy-4-methyl-1,3-oxazole
• CAS: 68484-91-3
• 化学式: C₁₃H₁₅NO₂
• 分子量: 217.268
• InChiKey: VILONABYAGCZGJ-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  16
• 可旋转键数：
  4
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.31
• 拓扑面积：
  35.3
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  2-benzyl-4-methyl-5-ethoxy-1,3-oxazole 在 水 、 potassium hydroxide 作用下， 以 甲醇 为溶剂， 反应 1.83h， 生成 4-acetyl-2-benzyl-5-hydroxy-6-methylnicotinic acid
  参考文献：
  名称：

  NOVEL PYRIDINE CARBOXYLIC ACID BASED COMPOUND USED AS A P2X1 AND P2X3 RECEPTOR ANTAGONIST, A PRODUCTION METHOD FOR THE SAME AND A COMPOSITION COMPRISING THE SAME

  摘要：

  提供了一种基于吡啶羧酸的新型化合物，用作P2X1和P2X3受体拮抗剂，以及该化合物的生产方法和包含该化合物的组合物。根据本发明的化合物是P2X1和P2X3受体的强效拮抗剂，因此可用作治疗或预防涉及神经疼痛或慢性炎症疾病的药物，这些疾病是由P2X1和P2X3受体活性引起的疾病。

  公开号：

  US20130040997A1
• 作为产物：
  描述：

  乳酸乙酯 在 2,6-二甲基吡啶 、 三氟甲磺酸三甲基硅酯 作用下， 以 二氯甲烷 为溶剂， 反应 1.55h， 生成 2-benzyl-4-methyl-5-ethoxy-1,3-oxazole
  参考文献：
  名称：

  从α-三氟乙氧基酯和腈中快速微波辅助合成5-烷氧基恶唑

  摘要：

  据报道，从易于获得的α-三氟乙氧基/羟基酯1和腈中，可以快速，普遍地获得各种取代的5-烷氧基恶唑2（即R 1，R 2 =烷基，苯基），产率高（41-76％）。示出了环化的多功能性，其对于一系列对甲磺酸酯上的三氟甲磺酸酯具有高选择性的底物，并证明与敏感的官能团相容。为了说明这种转变，最近分离出的羟基吡啶甲基多juguinate 4的第一个合成过程是通过5-烷氧基恶唑和丙烯酸的杂Diels-Alder反应，然后进行原脱羧反应，分四个步骤完成的。

  DOI：

  10.1021/jo301527t

文献信息

• Metal-Free Decarboxylative Hetero-Diels–Alder Synthesis of 3-Hydroxypyridines: A Rapid Access to <i>N</i>-Fused Bicyclic Hydroxypiperidine Scaffolds
  作者：Laurie-Anne Jouanno、Vincent Di Mascio、Vincent Tognetti、Laurent Joubert、Cyrille Sabot、Pierre-Yves Renard

  DOI：10.1021/jo402729a

  日期：2014.2.7

  A complete experimental and theoretical study of the thermally controlled metal-free decarboxylative hetero-Diels–Alder (HDA) reaction of 5-alkoxyoxazoles with acrylic acid is reported. This strategy offers a new entry to valuable 2,6-difunctionalized 3-hydroxypyridines from readily available 2- and 4-disubstituted 5-alkoxyoxazoles. The reaction conditions proved compatible with, among others, ketone

  报道了5-烷氧基恶唑与丙烯酸热控制的无金属脱羧杂狄尔斯-阿尔德（HDA）反应的完整实验和理论研究。该策略为易于获得的2-和4-二取代的5-烷氧基恶唑提供了有价值的2,6-二官能化的3-羟基吡啶的新入口。证明该反应条件尤其与酮，酰胺，酯，醚和腈基相容。该方案具有广泛的官能团耐受性，可通过吡啶脱芳构化策略快速而通用地获得羟基吲哚并咪唑和羟基喹oli嗪衍生物。
• Synthesis of polysubstituted 3-hydroxypyridines via the revisited hetero-Diels–Alder reaction of 5-alkoxyoxazoles with dienophiles
  作者：Cyrille Sabot、Emilia Oueis、Xavier Brune、Pierre-Yves Renard

  DOI：10.1039/c1cc16562c

  日期：——

  A general and single-step access to polysubstituted 3-hydroxypyridine scaffolds via hetero-Diels–Alder (HDA) reactions between readily prepared 5-ethoxyoxazoles and dienophiles is reported. The HDA reaction, run in the presence of Nd(OTf)3 at room temperature, was successfully applied to various 5-ethoxyoxazoles showing good functional group tolerance, and led to a straightforward process to obtain useful building-blocks.

  报告了一种通过5-乙氧基噁唑与亲双烯体之间的杂Diels-Alder（HDA）反应，一步合成多取代3-羟基吡啶骨架的通用方法。在室温下使用Nd(OTf)3作为催化剂的HDA反应，已成功应用于各种5-乙氧基噁唑，表现出良好的官能团耐受性，并实现了直接合成有用砌块的简便过程。
• Pyridin-3-ols
  申请人：BASF Aktiengesellschaft

  公开号：US04168379A1

  公开（公告）日：1979-09-18

  New pyridin-3-ols and their N-oxides and acid addition salts, which are useful as intermediates, especially for the preparation of pharmacologically active compounds, and their preparation.

  新的吡啶-3-醇及其N-氧化物和酸盐加成物，可作为中间体使用，特别适用于制备药理活性化合物，以及它们的制备。
• Design and synthesis of potent and selective P2X3 receptor antagonists derived from PPADS as potential pain modulators
  作者：Joong-Heui Cho、Kwan-Young Jung、Younghwan Jung、Min Hye Kim、Hyojin Ko、Chul-Seung Park、Yong-Chul Kim

  DOI：10.1016/j.ejmech.2013.10.026

  日期：2013.12

  Pyridoxalphosphate-6-azopheny1-2',4'-disulfonate (7a, PPADS), a nonselective P2X receptor antagonist, was extensively modified to develop more stable, potent, and selective P2X(3) receptor antagonists as potential antinociceptive agents. Based on the results of our previous report, all strong anionic groups in PPADS including phosphate and sulfonate groups were changed to carboxylic acids or deleted. The unstable azo (-N=N-) linkage of 7a was transformed to more stable carbon-carbon, ether or amide linkages through the synthesis of the 5-hydroxyl-pyridine moieties with substituents at 2 position via a Diels-Alder reaction. This resulted in the retention of antagonistic activity (IC50 = 400 similar to 700 nM) at the hP2X(3) receptor in the two-electrode voltage clamp (TEVC) assay system on the Xenopus oocytes. Introduction of bulky aromatic groups at the carbon linker, as in compounds 13h-n, dramatically improved the selectivity profiles of hP2X(3) when compared with mP2X(1) and hP2X(7) receptors. Among the substituents tested at the 2-position, the m-phenoxybenzyl group showed optimum selectivity and potency at the hP2X(3) receptor. In searching for effective substituents at the 4- and 3-positions, we found that compound 36j, with 4-carboxaldehyde, 3-propenoic acid and 2-(m-phenoxy)benzyl groups, was the most potent and selective hP2X(3) receptor antagonist with an IC50 of 60 nM at hP2X(3) and marginal antagonistic activities of 10 mu M at mP2X(1) and hP2X(7). Furthermore, using an ex-vivo assay system, we found that compound 36j potently inhibited pain signaling in the rat dorsal horn with 20 mu M 36j displaying 65% inhibition while 20 mu M pregabalin, a clinically available drug, showed only 31% inhibition. (C) 2013 Elsevier Masson SAS. All rights reserved.
• Cornforth, Chemistry of Penicillin
  作者：Cornforth

  DOI：——

  日期：——