2-methylene-4,4,5,5-tetramethyl-1,3-dioxolane | 69814-59-1

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 二氧戊环
• 英文名称: 2-methylene-4,4,5,5-tetramethyl-1,3-dioxolane
• 英文别名: 2-methylene-4,4,5,5-1,3-dioxolane；4,4,5,5-Tetramethyl-2-methylidene-1,3-dioxolane
• CAS: 69814-59-1
• 化学式: C₈H₁₄O₂
• 分子量: 142.198
• InChiKey: MPIJGRGTEPCZFB-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2
• 重原子数：
  10
• 可旋转键数：
  0
• 环数：
  1.0
• sp3杂化的碳原子比例：
  0.75
• 拓扑面积：
  18.5
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为反应物：
  描述：

  2-methylene-4,4,5,5-tetramethyl-1,3-dioxolane 在 盐酸 作用下， 以 氘代乙腈 、 水 为溶剂， 生成 pinacol monoacetate
  参考文献：
  名称：

  Tetrahedral intermediates. 2. The detection of hemiorthoesters in the hydration of ketene acetals and the mechanism of their breakdown

  摘要：

  DOI：

  10.1021/ja00397a030
• 作为产物：
  描述：

  2-(bromomethyl)-4,4,5,5-tetramethyl-1,3-dioxolane 、 potassium tert-butylate 生成 2-methylene-4,4,5,5-tetramethyl-1,3-dioxolane
  参考文献：
  名称：

  BHUSHAN, VIDYA;CHAKRABORTY, TUSHAR, K.;CHANDRASEKARAN, SRINIVASAN, J. ORG. CHEM., 1984, 49, N 21, 3974-3978

  摘要：

  DOI：

文献信息

• Tetrahedral intermediates 3
  作者：Brian Capon、Maria De Nazare De Matos Sanchez

  DOI：10.1016/s0040-4020(01)88634-8

  日期：1983.1

  whole series was studied in aqueous acetonitrile (cH2O= 8.33 M); 4b, 5b, and 6b were studied in aqueous acetonitrile (cH2O = 2.22 M) and 4b and 6b in water. Complete pcH-rate or pH-rate profiles were obtained for each reaction. The mechanisms of the hydronium-ion, hydroxide-ion and “water” catalysed reactions are discussed and compared to those for the breakdown of hemiacetals and the hydrolysis of orthoesters

  已经研究了由乙酸二烷氧基烷基酯或乙烯酮缩醛产生的半原酸酯分解的动力学。研究了以下化合物：半甲甲酸二甲酯（1b），半甲甲酸二乙酯（2b），2-羟基-1,3-二氧戊环（3b），2-羟基-4,4,5,5-四甲基-1、3-二氧戊环，（4b），2-羟基-2-甲基-1,3-二氧戊环（5b）和2-羟基-2,4,4,5,5-五甲基-1,3-二氧戊环（6b）。整体在乙腈水溶液中研究系列（C H 2 O = 8.33 M）；图4b，图5b，和图6B在乙腈水溶液中进行了研究（C ħ 2O = 2.22 M），以及水中的4b和6b。完整p Ç ħ对于每个反应，获得-rate或pH速率曲线。讨论了氢离子，氢氧根离子和“水”催化反应的机理，并将其与半缩醛的分解和原酸酯的水解进行了比较。
• PREPARATION OF AN AQUEOUS DISPERSION OF COPOLYMER PARTICLES OF VINYL ACETATE AND A CYCLIC KETENE ACETAL MONOMER
  申请人：Rohm and Haas Company

  公开号：EP3722334A1

  公开（公告）日：2020-10-14

  The present invention relates to a method comprising the steps of a) contacting under emulsion polymerization conditions vinyl acetate; a cyclic ketene acetal monomer; and a monoethylenically unsaturated acid monomer or a salt thereof; to form an aqueous dispersion of copolymer particles comprising structural units of vinyl acetate, the cyclic ketene acetal, and the monoethylenically unsaturated acid monomer or a salt thereof; wherein the cyclic ketene acetal monomer is characterized by following structure: where n and the R groups are as defined herein. The method of the present invention provides a water-borne dispersion that is substantially free of volatile organic solvents and that provides a readily degradable polymer that is useful, for example, in the manufacture of biodegradable packaging products.

  本发明涉及一种方法，包括以下步骤 a) 在乳液聚合条件下，将乙酸乙烯酯、环己酮缩醛单体和单乙烯基不饱和酸单体或其盐接触，形成共聚物颗粒的水分散液，共聚物颗粒由乙酸乙烯酯、环己酮缩醛和单乙烯基不饱和酸单体或其盐的结构单元组成；其中环己酮缩醛单体的结构特征如下： 其中 n 和 R 基团如本文所定义。本发明的方法提供了一种水性分散体，该分散体基本上不含挥发性有机溶剂，并提供了一种易降解聚合物，可用于制造生物可降解包装产品等。
• AQUEOUS DISPERSION OF COPOLYMER PARTICLES OF VINYL ACETATE AND A CYCLIC KETENE ACETAL MONOMER
  申请人：Rohm and Haas Company

  公开号：EP3722341A1

  公开（公告）日：2020-10-14

  The present invention relates to a composition comprising an aqueous dispersion of copolymer particles comprising structural units of vinyl acetate, a cyclic ketene acetal monomer, and a monoethylenically unsaturated acid monomer, or a salt thereof; wherein the cyclic ketene acetal monomer is characterized by following structure: where n and the R groups are as defined herein. The composition of the present invention provides a water-borne dispersion that is substantially free of volatile organic solvents and that provides a readily degradable polymer that is useful, for example, in the manufacture of biodegradable packaging products.

  本发明涉及一种包含共聚物颗粒水分散液的组合物，共聚物颗粒包含乙酸乙烯酯、环酮缩醛单体和单乙烯基不饱和酸单体或其盐的结构单元；其中环酮缩醛单体的结构特征如下： 其中 n 和 R 基团如本文所定义。本发明的组合物提供了一种基本上不含挥发性有机溶剂的水性分散体，并提供了一种易于降解的聚合物，可用于制造可生物降解的包装产品等。
• Catalyst compositions and their use for hydrogenation of nitrile rubber
  申请人：ARLANXEO Deutschland GmbH

  公开号：US10508156B2

  公开（公告）日：2019-12-17

  Catalyst compositions based on Ruthenium- or Osmium-based complex catalysts and specific co-catalysts are provided for selectively hydrogenating nitrile rubbers in the presence of such catalyst compositions.

  提供了基于钌基或锇基络合物催化剂和特定助催化剂的催化剂组合物，用于在此类催化剂组合物存在下选择性氢化腈橡胶。
• Aqueous dispersion of copolymer particles of vinyl acetate and a cyclic ketene acetal monomer
  申请人：Rohm and Haas Company

  公开号：US11111328B2

  公开（公告）日：2021-09-07

  The present invention relates to a composition comprising an aqueous dispersion of copolymer particles comprising structural units of vinyl acetate, a cyclic ketene acetal monomer, and a monoethylenically unsaturated acid monomer, or a salt thereof; wherein the cyclic ketene acetal monomer is characterized by following structure: where n and the R groups are as defined herein. The composition of the present invention provides a water-borne dispersion that is substantially free of volatile organic solvents and that provides a readily degradable polymer that is useful, for example, in the manufacture of biodegradable packaging products.

  本发明涉及一种包含共聚物颗粒水分散液的组合物，共聚物颗粒包含乙酸乙烯酯、环酮缩醛单体和单乙烯基不饱和酸单体或其盐的结构单元；其中环酮缩醛单体的结构特征如下： 其中 n 和 R 基团如本文所定义。本发明的组合物提供了一种基本上不含挥发性有机溶剂的水性分散体，并提供了一种易于降解的聚合物，可用于制造可生物降解的包装产品等。