3-Bromo-4-methyl-2(5H)-furanone | 99848-02-9

• 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: 3-Bromo-4-methyl-2(5H)-furanone
• 英文别名: 3-bromo-4-methylfuran-2(5H)-one；3-bromo-4-methyl-5H-furan-2-one；3-Brom-4-methyl-5H-furan-2-on；α-Brom-γ-hydroxy-β-methyl-crotonsaeure-lacton；4-bromo-3-methyl-2H-furan-5-one
• CAS: 99848-02-9
• 化学式: C₅H₅BrO₂
• 分子量: 176.997
• InChiKey: ILOPSRAMCLRQDX-UHFFFAOYSA-N

物化性质

• 熔点：
  64-65 °C(Solv: carbon tetrachloride (56-23-5))
• 沸点：
  59 °C(Press: 0.12 Torr)
• 密度：
  1.6864 g/cm3

计算性质

• 辛醇/水分配系数(LogP)：
  1
• 重原子数：
  8
• 可旋转键数：
  0
• 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：

  3-Bromo-4-methyl-2(5H)-furanone 在 sodium hydroxide 、 叔丁基锂 作用下， 以 四氢呋喃 、 1,4-二氧六环 、 吡啶 、 四氯化碳 、 various solvents 、 水 、 正戊烷 为溶剂， 反应 28.02h， 生成 3-[(1S)-hydroxy-2-methylpropyl]-4-methylfuran-2(5H)-one
  参考文献：
  名称：

  Bioactive butenolides from Streptomyces antibioticus TÜ 99: absolute configurations and synthesis of analogs

  摘要：

  The four furanones (butenolides) 1-4, which had been isolated from the fermentation broth of Streptomyces antibioticus TU 99 and in preliminary tests had been shown to be biologically active, were synthesized by reaction of the readily available furanones 9 or 16 with 2-methylpropanal or 2-methylbutanal. In addition, a series of analogs was prepared in a similar way from 16 using different aldehydes. The hitherto unknown absolute configurations of the natural products 1-4 as well as those of all the analogs prepared were determined with Mosher's NMR method and/or X-ray crystallography. Some of the compounds synthesized proved to be active in the quorum sensing system of Chromobacterium violaceum. (C) 2003 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(03)00483-6
• 作为产物：
  描述：

  4-甲基-2(5H)-呋喃酮 在 2,4,6-三甲基吡啶 、 溴 作用下， 以 二氯甲烷 、 氯仿 为溶剂， 反应 25.5h， 生成 3-Bromo-4-methyl-2(5H)-furanone
  参考文献：
  名称：

  Bioactive butenolides from Streptomyces antibioticus TÜ 99: absolute configurations and synthesis of analogs

  摘要：

  The four furanones (butenolides) 1-4, which had been isolated from the fermentation broth of Streptomyces antibioticus TU 99 and in preliminary tests had been shown to be biologically active, were synthesized by reaction of the readily available furanones 9 or 16 with 2-methylpropanal or 2-methylbutanal. In addition, a series of analogs was prepared in a similar way from 16 using different aldehydes. The hitherto unknown absolute configurations of the natural products 1-4 as well as those of all the analogs prepared were determined with Mosher's NMR method and/or X-ray crystallography. Some of the compounds synthesized proved to be active in the quorum sensing system of Chromobacterium violaceum. (C) 2003 Elsevier Science Ltd. All rights reserved.

  DOI：

  10.1016/s0040-4020(03)00483-6

文献信息

• Selective synthesis of (Z)-4-aryl-5-[1-(aryl)methylidene]-3-bromo-2(5H)-furanones
  作者：Fabio Bellina、Chiara Anselmi、Stéphane Viel、Luisa Mannina、Renzo Rossi

  DOI：10.1016/s0040-4020(01)01017-1

  日期：2001.12

  4-Aryl-3-bromo-2(5H)-furanones have been selectively synthesized in satisfactory yields by treatment of easily available 3,4-dibromo-2(5H)-furanone either with arylboronic acids in the presence of Ag2O and a catalytic amount of PdCl2(MeCN)2 or with aryl(trialkyl)stannanes in the presence of a catalyst precursor consisting of AsPh3 and a Pd(II) or a Pd(0) compound. These monobromo derivatives have been

  通过在Ag 2的存在下用芳基硼酸处理易得的3,4-二溴-2（5 H）-呋喃酮，以令人满意的产率选择性合成了4-Aryl-3-bromo-2（5 H）-呋喃酮在由AsPh 3和Pd（II）或Pd（0）化合物组成的催化剂前体存在下，由O和催化量的PdCl 2（MeCN）2或与芳基（三烷基）锡烷一起催化。这些一溴衍生物已被用作各种（Z）-4-芳基-5- [1-（芳基）亚甲基] -3-溴-2（5 H-呋喃酮，包括具有与报道的天然存在的rubrolide N相对应的结构的化合物。这些合成化合物的结构和立体化学均已通过NMR技术明确确定。
• Total Synthesis of (±)-Merrilactone A
  作者：Wei He、Jie Huang、Xiufeng Sun、Alison J. Frontier

  DOI：10.1021/ja0761986

  日期：2008.1.1

  The total synthesis of racemic merrilactone A (a neurotrophic agent) is described, featuring simultaneous and stereospecific creation of the C4 and C5 stereocenters via a notable silyloxyfuran Nazarov cyclization. Full details of the successful synthetic strategy are given, as well as several examples of the interesting reactivity of intermediates that were prepared and studied during the execution

  描述了外消旋 merrilactone A（一种神经营养剂）的全合成，其特点是通过显着的甲硅烷氧基呋喃 Nazarov 环化同时和立体定向地创建 C4 和 C5 立体中心。给出了成功合成策略的完整细节，以及在执行全合成过程中制备和研究的中间体的有趣反应性的几个例子。对路易斯酸催化的甲硅烷氧基呋喃 Nazarov 环化进行了详细研究，包括对底物范围和局限性的系统研究。此外，进行的实验表明路易斯酸性硅物质参与了纳扎罗夫环化。
• Gegenseitige �berf�hrung von ?-Keto-?-lactonen und ??, ?-Butenoliden
  作者：F. Fleck、H. Schinz

  DOI：10.1002/hlca.19500330123

  日期：——

  A. Das durch Hydrieren von α-Keto-β-methyl-γ-lacton erhältliche α-Oxy-β-methyl-γ-lacton wurde über das α-Chlor-β-methyl-γ-lacton in Δα, β-Methyl-butenolid übergeführt.

  A. Das durch Hydrieren vonα-酮基-β-甲基-γ-内酯erhältlicheα-Oxy-β-甲基-γ-内酯在αα ，β-甲基中的α-氯-β-甲基-γ-内酯-butenolidübergeführt。
• Rossi; Bellina; Raugei, Synlett, 2000, # 12, p. 1749 - 1752
  作者：Rossi、Bellina、Raugei

  DOI：——

  日期：——