3,4-dimethyl-3-phenyl-γ-valerolactone | 90691-70-6

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 内酯类
• 英文名称: 3,4-dimethyl-3-phenyl-γ-valerolactone
• 英文别名: 4,5,5-trimethyl-4-phenyldihydrofuran-2(3H)-one；4,5,5-trimethyl-4-phenyl-dihydro-furan-2-one；4,5,5-Trimethyl-4-phenyl-dihydro-furan-2-on；4,5,5-Trimethyl-4-phenyloxolan-2-one
• CAS: 90691-70-6
• 化学式: C₁₃H₁₆O₂
• 分子量: 204.269
• InChiKey: ANJJLMQWDIOARK-UHFFFAOYSA-N

物化性质

• 熔点：
  92 °C(Solv: ethyl ether (60-29-7); ligroine (8032-32-4))
• 沸点：
  324.1±31.0 °C(Predicted)
• 密度：
  1.035±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.7
• 重原子数：
  15
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.46
• 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：

  2,2,2-三甲基苯乙酮 在 氢溴酸 、 potassium carbonate 、 溶剂黄146 、 乙酰氯 、 锌 、 苯 作用下， 生成 3,4-dimethyl-3-phenyl-γ-valerolactone
  参考文献：
  名称：

  Data extraction from the web based on pre-defined schema

  摘要：

  With the development of the Internet, the World Wide Web has become an invaluable information source for most organizations. However, most documents available from the Web are in HTML form which is originally designed for document formatting with little consideration of its contents. Effectively extracting data from such documents remains a non-trivial task. In this paper, we present a schema-guided approach to extracting data from HTML pages. Under the approach, the user defines a schema specifying what to be extracted and provides sample mappings between the schema and the HTML page. The system will induce the mapping rules and generate a wrapper that takes the HTML page as input and produces the required data in the form of XML conforming to the user-defined schema. A prototype system implementing the approach has been developed. The preliminary experiments indicate that the proposed semi-automatic approach is not only easy to use but also able to produce a wrapper that extracts required data from inputted pages with high accuracy.

  DOI：

  10.1007/bf02943278

文献信息

• Tertiary Alkylations of Aldehydes, Ketones or Imines Using Benzylic Organoboronates and a Base Catalyst
  作者：Yukiya Sato、Kei Nakamura、Kenya Yabushita、Kazunori Nagao、Hirohisa Ohmiya

  DOI：10.1246/bcsj.20200122

  日期：2020.9.15

  The KHMDS-catalyzed tertiary alkylation of aldehydes, ketones or imines using tertiary benzylic organoboronates is reported. This protocol permitted the use of tertiary benzylic alkylboronates as t...

  报道了使用叔苄基有机硼酸酯的 KHMDS 催化的醛、酮或亚胺的叔烷基化反应。该协议允许使用叔苄基烷基硼酸盐作为...
• Carbonium ion rearrangement in the synthesis of γ-lactones from (E)-β-alkylcinnamic acids
  作者：Lars Jalander

  DOI：10.1016/s0040-4039(00)99910-6

  日期：1984.1

  A possible formation of a bridged carbonium ion intermediate in the lactonization of (E)-β-t-butylcinnamic acid is discussed on the basis of deuteriation and 13C NMR experiments.

  基于氘化和13 C NMR实验，讨论了在（E）-β-叔丁基肉桂酸的内酯化过程中桥碳鎓离子中间体的可能形成。
• JALANDER, L., TETRAHEDRON LETT., 1984, 25, N 4, 457-460
  作者：JALANDER, L.

  DOI：——

  日期：——
• Data extraction from the web based on pre-defined schema
  作者：Xiaofeng Meng、Hongjun Lu、Haiyan Gang、Mingzhe Gu

  DOI：10.1007/bf02943278

  日期：2002.7

  With the development of the Internet, the World Wide Web has become an invaluable information source for most organizations. However, most documents available from the Web are in HTML form which is originally designed for document formatting with little consideration of its contents. Effectively extracting data from such documents remains a non-trivial task. In this paper, we present a schema-guided approach to extracting data from HTML pages. Under the approach, the user defines a schema specifying what to be extracted and provides sample mappings between the schema and the HTML page. The system will induce the mapping rules and generate a wrapper that takes the HTML page as input and produces the required data in the form of XML conforming to the user-defined schema. A prototype system implementing the approach has been developed. The preliminary experiments indicate that the proposed semi-automatic approach is not only easy to use but also able to produce a wrapper that extracts required data from inputted pages with high accuracy.