2,2,6,6-tetramethyl-5,6-dihydro-2H-pyrane | 32319-76-9

• 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: 2,2,6,6-tetramethyl-5,6-dihydro-2H-pyrane
• 英文别名: 2.2.6.6-Tetramethyl-2.3-dihydropyran；2,2,6,6-tetramethyl-3H-pyran
• CAS: 32319-76-9
• 化学式: C₉H₁₆O
• 分子量: 140.225
• InChiKey: IETHYMPINVRLNV-UHFFFAOYSA-N

物化性质

• 沸点：
  153.8±29.0 °C(Predicted)
• 密度：
  0.836±0.06 g/cm3(Predicted)

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：
  0.78
• 拓扑面积：
  9.2
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为产物：
  描述：

  (Z)-2,6-dimethyl-3-hepten-2,6-diol 在 磷酸 作用下， 以 正己烷 为溶剂， 反应 0.25h， 以99%的产率得到2,2,6,6-tetramethyl-5,6-dihydro-2H-pyrane
  参考文献：
  名称：

  1,3-dichloropropene as a source of the 1,3-dianion derived from propene: Synthesis of unsaturated 1,5-diols and dihydropyrans

  摘要：

  The reaction of 1,3-dichloropropene (1, ca. 1/1 Z/E mixture) with an excess of lithium powder and a catalytic amount of 4,4'-di-tert-butylbiphenyl (DTBB, 5 mol %) in the presence of an electrophile [Me(2)CO, Et(2)CO, (CH2)(4)CO, (CH2)(5)CO, Bu(t)CHO, Me(3)SiCl] in THF at 0 degrees C affords, after hydrolysis with water, the expected unsaturated 1,5-diols 3 as a Z/E mixture or disilane (E)-4. Treatment of isolated compounds (Z)-3 with 85% phosphoric acid gives the expected dihydropyrans 5.

  DOI：

  10.1016/s0040-4020(01)89335-2

文献信息

• Catalyst, process for its preparation and process for polymerization of olefins using this catalyst
  申请人：SHOWA DENKO KABUSHIKI KAISHA

  公开号：EP0383346A2

  公开（公告）日：1990-08-22

  Disclosed is a catalyst composition for use in the polymerization of olefins, which is comprised of (a) a catalyst component containing magnesium, titanium, a halogen, and an ingredient derived from an ester compound, and (b) an organic aluminum compound. The catalyst activity and capability of providing a highly stereoregular polymer are enhanced by preparing the catalyst component (a) by a process wherein, during or after the formation of a solid catalyst component containing magnesium, titanium, and a halogen, the solid catalyst component is treated with an ester of the formula: (R¹O)i(R²O)j(R³O)k-Z-COOR⁴      (I) wherein R¹, R², R³ and R⁴ are an aliphatic, alicyclic, aromatic, polycyclic or heterocyclic compound group, Z is an aliphatic or alicyclic hydrocarbon group in which hydrogen may be substituted with an aromatic or polycyclic group, and i, j and k are integers of 0 to 3 with the provisio that the sum of i, j and k is at least 1.

  本发明公开了一种用于烯烃聚合的催化剂组合物，该催化剂组合物由 (a) 催化剂组分和 (b) 有机铝化合物组成，催化剂组分(a)含有镁、钛、卤素和一种从酯类化合物中提取的成分，(b)有机铝化合物。通过以下工艺制备催化剂组分 (a)，可提高催化剂活性和提供高度立体配位聚合物的能力：在含有镁、钛和卤素的固体催化剂组分形成过程中或形成之后，用式如下的酯处理该固体催化剂组分： (R¹O)i(R²O)j(R³O)k-Z-COOR⁴ (I) 其中，R¹、R²、R³ 和 R⁴ 是脂肪族、脂环族、芳香族、多环族或杂环族化合物基团；Z 是脂肪族或脂环族烃基团，其中的氢可被芳香族或多环基团取代；i、j 和 k 是 0 至 3 的整数，但 i、j 和 k 之和至少为 1。
• Propylene-based polymer, method for its production, composition thereof
  申请人：SHOWA DENKO KABUSHIKI KAISHA

  公开号：EP0821012A2

  公开（公告）日：1998-01-28

  There are provided a propylene-based polymer characterized in that (1) the xylene-extraction insoluble portion (XI) is 99.0 wt% or greater, (2) the isotactic pentad ratio (IP) is 98.0% or greater as measured by 13C nuclear magnetic resonance spectroscopy, (3) the isotactic average chain length (N) is 500 or greater, and (4) the total amount of each of the fractions obtained by column separation of the xylene insolubles whose average chain length (Nf) is 800 or greater accounts for 10 wt% or more of the entirety, and a method for its production, as well as a propylene-based polymer composition prepared by combining with this propylene-based polymer at least a nucleating agent in the range of 0.05-15 wt%.

  本发明提供了一种丙烯基聚合物，其特征在于：(1)二甲苯萃取不溶部分(XI)为99.0重量％或更高；(2)根据13C核磁共振光谱测定，异构五元比(IP)为98.0% 或更高，(3) 异构体平均链长 (N) 为 500 或更高，(4) 通过柱分离二甲苯不溶物获得的平均链长 (Nf) 为 800 或更高的各馏分的总量占总量的 10 wt% 或更高，及其生产方法，以及通过与该丙烯基聚合物结合至少 0.05-15 wt% 的成核剂而制备的丙烯基聚合物组合物。
• Guijarro Albert, Yus Miguel, Tetrahedron, 50 (1994) N 46, S 13269-13276
  作者：Guijarro Albert, Yus Miguel

  DOI：——

  日期：——
• Catalyst, process for preparation of same, and process for polymerization of olefins using same
  申请人：SHOWA DENKO KABUSHIKI KAISHA

  公开号：EP0407808B1

  公开（公告）日：1994-12-07
• PROPYLENE POLYMER, PROCESS FOR PRODUCING THE SAME, COMPOSITION THEREOF, POLYMERIZATION CATALYST COMPONENT, AND PROCESS FOR PRODUCING THE SAME
  申请人：SHOWA DENKO KABUSHIKI KAISHA

  公开号：EP0712869B1

  公开（公告）日：1998-08-05