5-acetyl-6-methyl-4-phenyl-2H-pyran-2-one

• 分子结构分类: 有机化合物 - 有机氧化合物
• 英文名称: 5-acetyl-6-methyl-4-phenyl-2H-pyran-2-one
• 英文别名: 5-Acetyl-6-methyl-4-phenylpyran-2-one；5-acetyl-6-methyl-4-phenylpyran-2-one
• 化学式: C₁₄H₁₂O₃
• 分子量: 228.247
• InChiKey: SWGZCBKNKVAGTF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  1.7
• 重原子数：
  17
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.14
• 拓扑面积：
  43.4
• 氢给体数：
  0
• 氢受体数：
  3

反应信息

• 作为产物：
  描述：

  在 五羰基溴铼(I) 作用下， 以 甲苯 为溶剂， 反应 24.0h， 以100%的产率得到5-acetyl-6-methyl-4-phenyl-2H-pyran-2-one
  参考文献：
  名称：

  ReBr(CO)5-catalyzed sequential addition–cyclization of 1,3-dicarbonyl compounds with electron-deficient internal alkynes affording trisubstituted 2H-pyran-2-ones

  摘要：

  The reaction of 1,3-dicarbonyl compounds such as acetoacetate, acetylacetone, dibenzoylmethane, and benzoylacetate with electron-deficient internal alkynes in the presence of catalytic amount of ReBr( CO) 5 in toluene under neutral conditions resulted in the formation of 4,5,6-trisubstituted 2H-pyran-2-ones in moderate to high yield. The reaction took place via a two-step sequence including the rhenium(I)-catalyzed addition of the activated methylenes to alkynes to give enolic 2-alkenyl derivatives, and subsequently dealcoholic cyclization to form 2H-pyran-2-one derivatives. (c) 2007 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tet.2007.09.038

文献信息

• Hydroalkylation leading to heterocyclic compounds. Part 1: New strategies for the synthesis of polysubstituted 2H-pyran-2-ones
  作者：Wei-Bing Liu、Huan-Feng Jiang、Chun-Li Qiao

  DOI：10.1016/j.tet.2008.12.069

  日期：2009.3

  Polysubstituted 2H-pyran-2-ones and 5,6-dihydro-2H-pyran-2-ones were synthesized via the MCRs initiated by the hydroalkylation of alkynoates with activated methylenes. Under the optimized reaction conditions, the desired products were obtained in 47–88% isolated yields. The experimental results showed that the groups on activated methylenes act important roles in the nucleophilic attack fashion.

  经由MCR合成多取代的2 H-吡喃-2-酮和5,6-二氢-2 H-吡喃-2-酮，所述MCR是通过炔烃与活化的亚甲基的加氢烷基化反应而引发的。在优化的反应条件下，所需产物的分离产率为47-88％。实验结果表明，活化亚甲基上的基团以亲核攻击方式起着重要作用。
• Synthesis of Polysubstituted α-Pyrones Using Zinc-Catalyzed Addition-Cyclization Reactions
  作者：Wei-Bing Liu、Cui Chen、Qing Zhang、Zhi-Bo Zhu

  DOI：10.1002/jhet.1698

  日期：2014.9

  Various polysubstituted α‐pyrone derivatives have been directly synthesized via a hydroalkylation of Michael additional reaction following a cyclized process catalyzed by the Lewis acid of Zn(OAc)2. This protocol provides a new convenient and step‐economical route to construct heterocycles. Fourteen examples are obtained from easily available materials with moderate to good yields.

  在Zn（OAc）2的路易斯酸催化的环化过程之后，通过迈克尔附加反应的加氢烷基化反应已直接合成了各种多取代的α-吡喃酮衍生物。该协议为构建杂环化合物提供了一种新的便捷且经济的途径。从容易获得的材料中获得了十四个示例，它们具有中等到良好的产率。
• Divergent NHC-Catalyzed Oxidative Transformations of 3-Bromoenal: Selective Synthesis of 2<i>H</i>-Pyran-2-ones and Chiral Dihydropyranones
  作者：Gang Wang、Xia Chen、Gaohan Miao、Weijun Yao、Cheng Ma

  DOI：10.1021/jo400950j

  日期：2013.6.21

  A selective synthesis of either 2H-pyran-2-ones (4) or chiral dihydropyranones (6) from the same substrates of 3-bromoenals and 1,3-dicarbonyl compounds upon oxidative N-heterocyclic carbene catalysis is presented. It is shown that the oxidative transformation of 3-bromoenals under NHC catalyst can be well controlled to proceed through two pathways, i.e., elimination of reducible β-bromide or by an

  提出了在氧化的N-杂环卡宾催化下，由3-溴烯醛和1,3-二羰基化合物的相同底物选择性合成2 H-吡喃-2-酮（4）或手性二氢吡喃酮（6）的方法。结果表明，可以很好地控制NHC催化剂下3-溴烯醛的氧化转化，通过两条途径进行，即消除可还原的β-溴化物或通过外部氧化剂3进行，从而选择性地产生两种不饱和酰基偶氮，分别。
• Construction of Functionalized 2<i>H</i>-Pyran-2-ones via N-Heterocyclic Carbene-Catalyzed [3 + 3] Annulation of Alkynyl Esters with Enolizable Ketones
  作者：Zheng Liang、Jibin Li、Lei Wang、Zexuan Wei、Jiahui Huang、Xinrui Wang、Ding Du

  DOI：10.1021/acs.joc.2c02392

  日期：2023.2.3

  A new synthesis of functionalized 2H-pyran-2-ones has been developed through N-heterocyclic carbene-catalyzed formal [3 + 3] annulation of alkynyl esters with enolizable ketones. The key to the success of this protocol relies on the use of an NHC instead of a tertiary amine as the catalyst. This protocol also features a broad substrate scope and mild metal-free conditions, offering simple and rapid

  通过 N-杂环卡宾催化的炔基酯与可烯醇化酮的正式 [3 + 3] 环化，开发了功能化 2 H -pyran-2-ones的新合成方法。该协议成功的关键在于使用 NHC 而不是叔胺作为催化剂。该协议还具有广泛的底物范围和温和的无金属条件，以高度区域选择性的方式提供对目标分子的简单快速访问。
• Ruhemann, Journal of the Chemical Society, <hi>1899</hi>, vol. 75, p. 415
  作者：Ruhemann

  DOI：——

  日期：——