4-octynyl-6-methyl-2-pyrone | 502624-18-2

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 吡喃
• 英文名称: 4-octynyl-6-methyl-2-pyrone
• 英文别名: 2H-Pyran-2-one, 6-methyl-4-(1-octynyl)-；6-methyl-4-oct-1-ynylpyran-2-one
• CAS: 502624-18-2
• 化学式: C₁₄H₁₈O₂
• 分子量: 218.296
• InChiKey: QURBWGIRSNVOPH-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  4.1
• 重原子数：
  16
• 可旋转键数：
  5
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.5
• 拓扑面积：
  26.3
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  4-羟基-6-甲基-2-吡喃酮 在 bis-triphenylphosphine-palladium(II) chloride 三溴化磷 、 二异丙胺 作用下， 以 四氢呋喃 、 N,N-二甲基甲酰胺 为溶剂， 生成 4-octynyl-6-methyl-2-pyrone
  参考文献：
  名称：

  An efficient synthesis of 4-alkenyl/alkynyl-6-methyl-2-pyrones via Pd-catalysed coupling on 4-bromo-6-methyl-2-pyrone

  摘要：

  We herein report the efficient syntheses of biologically active 4-alkenyl- and 4-alkynyl-6-methyl-2-pyrones using Pd-catalysed coupling procedures. A palladium on carbon/triphenylphosphine combination is shown to be the most effective catalyst for Sonogashira cross-coupling of several terminal acetylenes with 4-bromo-6-methyl-2-pyrone in yields of up to 95%. (C) 2002 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4039(02)02207-4

文献信息

• Palladium-Catalysed Alkynylations of 2-Pyrone (Pyran-2-one) Halides
  作者：Ian J. Fairlamb、Feng Ju Lu、Jan Peter Schmidt

  DOI：10.1055/s-2003-42405

  日期：——

  The 2-pyrone sub-unit is found in a large number of natural products possessing broad-spectrum biological activity. As such, efficient synthetic methods are required to enable facile access to substituted 2-pyrone derivatives. Important conditions for the Sonogashira alkynylation of 4-bromo-6-methyl-2-pyrone (3a) have been developed, and compared against Negishi’s methodology. The best conditions for Sonogashira alkynylation was found to be the use of Pd/C with added Ph3P as the catalyst, in the presence of catalytic CuI, in a mixture of MeCN and Et3N at reflux. Using Negishi’s standard conditions, terminal alkynylzinc reagents, generated in situ from terminal alkynes with LDA or n-BuLi and subsequent reaction with anhydrous ZnBr2, were reacted with 3a at room temperature using Pd(PPh3)4 as the catalyst in THF.

  2-吡喃酮亚基存在于许多具有广谱生物活性的天然产物中。因此，需要高效的合成方法以便于制备取代的2-吡喃酮衍生物。已经开发出重要的条件用于4-溴-6-甲基-2-吡喃酮（3a）的Sonogashira炔基化反应，并与其基于Negishi的方法进行了比较。最佳的Sonogashira炔基化条件是使用添加了Ph3P的Pd/C作为催化剂，在含有催化量CuI的MeCN和Et3N混合物中回流。按照Negishi的标准条件，由端炔与LDA或n-BuLi反应生成并随后与无水ZnBr2反应生成的端炔基锌试剂，在室温下以Pd(PPh3)4作为催化剂在THF中与3a反应。
• An efficient synthesis of 4-alkenyl/alkynyl-6-methyl-2-pyrones via Pd-catalysed coupling on 4-bromo-6-methyl-2-pyrone
  作者：Lester R. Marrison、Julia M. Dickinson、Razwan Ahmed、Ian J.S. Fairlamb

  DOI：10.1016/s0040-4039(02)02207-4

  日期：2002.12

  We herein report the efficient syntheses of biologically active 4-alkenyl- and 4-alkynyl-6-methyl-2-pyrones using Pd-catalysed coupling procedures. A palladium on carbon/triphenylphosphine combination is shown to be the most effective catalyst for Sonogashira cross-coupling of several terminal acetylenes with 4-bromo-6-methyl-2-pyrone in yields of up to 95%. (C) 2002 Elsevier Science Ltd. All rights reserved.
• Bioactive 4-substituted-6-methyl-2-pyrones with promising cytotoxicity against A2780 and K562 cell lines
  作者：Lester R. Marrison、Julia M. Dickinson、Ian J.S. Fairlamb

  DOI：10.1016/s0960-894x(02)00824-7

  日期：2002.12

  Bioactive synthetic 4-substituted-6-methyl-2-pyrones are reported. Various 4-substitutents have been incorporated using Pd-catalysed carbon-carbon bond coupling procedures. Preliminary screening of the 2-pyrones against human ovarian carcinoma (A2780) and human chronic myelogenous leukaemia (K562) cell lines show that 4-alkynyl-6-methyl-2-pyrones have excellent potential as anticancer agents. The pyrones demonstrate broad spectrum antimicrobial activities. (C) 2002 Elsevier Science Ltd. All rights reserved.