ethyl 3-hydroxy-4,4-dimethyl-3-phenylpentanoate | 94327-55-6

• 分子结构分类: 有机化合物 - 苯类化合物 - 苯和取代衍生物
• 英文名称: ethyl 3-hydroxy-4,4-dimethyl-3-phenylpentanoate
• 英文别名: 3-hydroxy-4,4-dimethyl-3-phenyl-valeric acid ethyl ester；3-Hydroxy-4,4-dimethyl-3-phenyl-valeriansaeure-aethylester
• CAS: 94327-55-6
• 化学式: C₁₅H₂₂O₃
• 分子量: 250.338
• InChiKey: VWDSUTNQNBRVSC-UHFFFAOYSA-N

物化性质

• 沸点：
  162 °C(Press: 16 Torr)
• 密度：
  1.0364 g/cm3(Temp: 20.5 °C)

计算性质

• 辛醇/水分配系数(LogP)：
  2.8
• 重原子数：
  18
• 可旋转键数：
  6
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.53
• 拓扑面积：
  46.5
• 氢给体数：
  1
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  ethyl 3-hydroxy-4,4-dimethyl-3-phenylpentanoate 在 氢溴酸 、 potassium carbonate 、 溶剂黄146 、 乙酰氯 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
• 作为产物：
  描述：

  三甲基乙酰氯 在 甲苯 、 锌 、 苯 作用下， 生成 ethyl 3-hydroxy-4,4-dimethyl-3-phenylpentanoate
  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

• High-Intensity Ultrasound-Promoted Reformatsky Reactions
  作者：Nathan A. Ross、Richard A. Bartsch

  DOI：10.1021/jo0261395

  日期：2003.1.1

  Reformatsky reactions of a phenyl ketone, an alpha-bromoester, zinc dust, and a catalytic amount of iodine in dioxane under high-intensity ultrasound (HIU) irradiation from an ultrasonic probe give high yields of beta-hydroxyesters in short reaction times. A series of alkyl phenyl ketones with increasing steric demands of the alkyl group are evaluated as potential electrophiles for the reactions with

  在超声探头进行的高强度超声（HIU）辐射下，苯甲酮，α-溴酸酯，锌粉和催化量的碘在二恶烷中的Reformatsky反应可在短反应时间内获得高产率的β-羟基酯。烷基的空间需求增加的一系列烷基苯基酮被评价为与几种α-溴代酯反应的潜在亲电子试剂，这些α-溴代酯的空间需求也不断增加。发现在HIU下的Reformatsky反应是浓度依赖性的。
• 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.