3-羟基-4,4-二甲基-3-苯基戊酸 | 92156-75-7

• 分子结构分类: 有机化合物 - 苯丙烷和聚酮 - 苯丙酸
• 中文名称: 3-羟基-4,4-二甲基-3-苯基戊酸
• 英文名称: 3-Hydroxy-3-phenyl-4.4-dimethyl-valeriansaeure
• 英文别名: 3-hydroxy-4,4-dimethyl-3-phenylpentanoic acid；3-hydroxy-4,4-dimethyl-3-phenyl-valeric acid；3-Hydroxy-4,4-dimethyl-3-phenyl-valeriansaeure
• CAS: 92156-75-7
• 化学式: C₁₃H₁₈O₃
• 分子量: 222.284
• InChiKey: HRIHMRGGECNDOJ-UHFFFAOYSA-N

物化性质

• 熔点：
  143 °C
• 沸点：
  360.7±30.0 °C(Predicted)
• 密度：
  1.123±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  2.1
• 重原子数：
  16
• 可旋转键数：
  4
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.46
• 拓扑面积：
  57.5
• 氢给体数：
  2
• 氢受体数：
  3

反应信息

• 作为反应物：
  描述：

  3-羟基-4,4-二甲基-3-苯基戊酸 在 硫酸 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：

  2,2,2-三甲基苯乙酮 在 potassium carbonate 、 锌 、 苯 作用下， 生成 3-羟基-4,4-二甲基-3-苯基戊酸
  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

• Base-Catalyzed Dehydrogenative Si-O Coupling of Dihydrosilanes: Silylene Protection of Diols
  作者：Martin Oestreich、Agnieszka Grajewska

  DOI：10.1055/s-0030-1258055

  日期：2010.10

  The direct dehydrogenative coupling of 1,3- and 1,4-diols and dihydrosilanes is efficiently catalyzed by Cs 2 CO 3 (10 mol%), cleanly affording six- and seven-membered 1,3-dioxo-2-silacycles with dihydrogen as the sole by-product. Conversely, 1,2-diols do not yield the expected 1,3-dioxo-2-silacyclopentanes, essentially forming cyclic disiloxanes instead. Aside from the synthetic convenience, the procedure

  1,3- 和 1,4- 二醇和二氢硅烷的直接脱氢偶联由 Cs 2 CO 3 (10 mol%) 有效催化，干净地提供六元和七元 1,3-二氧-2-硅环与二氢作为唯一的副产品。相反，1,2-二醇不会产生预期的 1,3-二氧代-2-硅杂环戊烷，而是主要形成环状二硅氧烷。除了合成方便外，该程序本身也可用于 GLC 分析之前的直接二醇衍生化。
• Grimaud,J.; Laurent,A., Bulletin de la Societe Chimique de France, 1969, p. 787 - 790
  作者：Grimaud,J.、Laurent,A.

  DOI：——

  日期：——
• Tsatsas, Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1945, vol. 220, p. 889
  作者：Tsatsas

  DOI：——

  日期：——