1,4-bis(2,4-dimethylphenyl)buta-1,3-diyne | 861778-19-0

• 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: 1,4-bis(2,4-dimethylphenyl)buta-1,3-diyne
• 英文别名: bis-(2,4-dimethyl-phenyl)-butadiyne；Bis-(2,4-dimethyl-phenyl)-butadiin；1-[4-(2,4-Dimethylphenyl)buta-1,3-diynyl]-2,4-dimethylbenzene；1-[4-(2,4-dimethylphenyl)buta-1,3-diynyl]-2,4-dimethylbenzene
• CAS: 861778-19-0
• 化学式: C₂₀H₁₈
• 分子量: 258.363
• InChiKey: NNMDOKFJFVNPQS-UHFFFAOYSA-N

物化性质

• 沸点：
  397.2±42.0 °C(Predicted)
• 密度：
  1.05±0.1 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  5.8
• 重原子数：
  20
• 可旋转键数：
  3
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.2
• 拓扑面积：
  0
• 氢给体数：
  0
• 氢受体数：
  0

反应信息

• 作为反应物：
  描述：

  1,4-bis(2,4-dimethylphenyl)buta-1,3-diyne 、 alkaline earth salt of/the/ methylsulfuric acid 生成 2,4-二甲基苯甲酸
  参考文献：
  名称：

  Grignard; Tcheoufaki, Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, 1929, vol. 188, p. 529

  摘要：

  DOI：
• 作为产物：
  描述：

  2,4-二甲基-1-碘苯 在 bis-triphenylphosphine-palladium(II) chloride 氢氧化钾 、 copper(l) iodide 、 氢气 、 三乙胺 作用下， 以 甲醇 、 乙腈 为溶剂， 反应 13.0h， 生成 1,4-bis(2,4-dimethylphenyl)buta-1,3-diyne
  参考文献：
  名称：

  Sonogashira Coupling Reaction with Diminished Homocoupling

  摘要：

  The side product from homocoupling reaction of two terminal acetylenes in the Sonogashira reaction can be reduced to about 2% using an atmosphere of hydrogen gas diluted with nitrogen or argon. Terminal arylethynes, diarylethynes, and a few new arylpyridylethynes with donor substituents have been synthesized in very good yields. Comparative control experiments suggest that the homocoupling yield is determined by concentration of both catalyst and oxygen.

  DOI：

  10.1021/ol034320+

文献信息

• Visual and tear function improvement after superficial phototherapeutic keratectomy (PTK) for mid-stromal corneal scarring
  作者：Murat Dogru、Chikako Katakami、Masato Miyashita、Etsuko Hida、Mamoru Uenishi、Kazuaki Tetsumoto、Sanae Kanno、Teruo Nishida、Akio Yamanaka

  DOI：10.1038/eye.2000.204

  日期：2000.9

  Purpose To study the changes in visual and tear film function following superficial excimer laser phototherapeutic keratectomy in patients with mid-stromal corneal scars. Methods Fourteen eyes of 14 patients with mid-stromal corneal scars seen at the Department of Ophthalmology at Kobe Kaisei Hospital underwent superficial phototherapeutic keratectomy (PTK). The subjects underwent routine ophthalmic examinations, corneal sensitivity measurements, tear film break-up time (BUT), Schirmer test and tear film lipid layer interferometry. Thirty eyes of 15 normal control subjects were also studied. The patients and the control subjects were compared for pre-PTK tear function parameters and tear film lipid layer interferometry grade. The alterations in these parameters within 6 months following PTK were also determined. Results Visual improvement was achieved in 12 eyes (86%). A hyperopic shift was observed in all eyes. The average pre-PTK corneal sensitivity and tear film BUT were lower in patients compared with control subjects before PTK. Tear film lipid layer interferometry grades were also higher in the patients than the controls before PTK. All these parameters improved gradually and significantly after PTK. Schirmer test results did not show any significant alterations after PTK. Conclusion We conclude that PTK is an effective means of treating corneal scars and attaining visual improvement, even in cases with deeper corneal involvement, and may obviate the need for corneal transplantation. Simultaneous improvements in corneal sensitivity and tear film stability suggest favourable effects of PTK on the ocular surface.

  目的：研究浅层准分子激光角膜切削术(PTK)后，中层基质性角膜瘢痕患者视觉和泪膜功能变化。方法：在神户海星医院眼科，14名中层基质性角膜瘢痕患者接受浅层PTK手术，共14眼。术前进行常规眼科检查，测量角膜敏感性、泪膜破裂时间(BUT)、泪液分泌测试和泪膜脂质层干涉测量。还研究了15例正常对照者的共30眼。比较术前患者和对照者的泪膜功能参数和泪膜脂质层干涉测量分级。术后6个月内这些参数的变化也进行了研究。结果：12眼(86%)改善了视力。所有眼出现远视漂移。术前患者角膜敏感性和泪膜BUT低于对照组。术前患者的泪膜脂层干涉测量分级高于对照组眼。这些参数术后逐渐显著提高。PTK后Schaumberg试验结果没有显著变化。结论：，结论:我们认为PTK是治疗角膜瘢痕并获得视力提高的有效方法，即便是伴有更深层角膜病变者，并且可能不再需要进行角膜移植。角膜敏感性和泪膜稳定性同时提高，表明PTK对眼表有良好的效应。
• Copper-Catalyzed Aerobic Oxidative Transformation of Ketone-Derived<i>N</i>-Tosyl Hydrazones: An Entry to Alkynes
  作者：Xianwei Li、Xiaohang Liu、Huoji Chen、Wanqing Wu、Chaorong Qi、Huanfeng Jiang

  DOI：10.1002/anie.201405058

  日期：2014.12.22

  A novel strategy involving Cu‐catalyzed oxidative transformation of ketone‐derived hydrazone moiety to various synthetic valuable internal alkynes and diynes has been developed. This method features inexpensive metal catalyst, green oxidant, good functional group tolerance, high regioselectivity and readily available starting materials. Oxidative deprotonation reactions were carried out to form internal

  已开发出一种新的策略，涉及铜催化的酮衍生部分转化为各种合成的有价值的内部炔烃和二炔。该方法的特点是廉价的金属催化剂，绿色氧化剂，良好的官能团耐受性，高区域选择性和易于获得的原料。进行氧化去质子反应以形成内部炔烃和对称二炔。进行hydr与卤化物和末端炔的交叉偶联反应，得到官能化的炔和不对称的共轭二炔。提出了通过碳卡宾中间体进行CC三键形成的机理。
• Homo and Heterocoupling of Terminal Alkynes Using Catalytic CuCl2 and DBU
  作者：Rengarajan Balamurugan、Naganaboina Naveen、Seetharaman Manojveer、Masthan Vali Nama

  DOI：10.1071/ch11080

  日期：——

  Homocoupling of terminal alkynes has been efficiently achieved using catalytic amounts of CuCl2 and DBU. This methodology could be extended to couple two different terminal alkynes together by taking one of the alkyne partners, preferably the electron rich alkyne, in five fold excess than the other.

  使用催化量的 CuCl2 和 DBU 可以有效地实现端炔的同偶联。这种方法可以扩展到将两个不同的末端炔烃耦合在一起，方法是将其中一个炔烃伙伴（最好是富电子炔烃）的用量比另一个多五倍。
• Grignard; Perrichon, Annales de Chimie (Cachan, France), 1926, vol. <10> 5, p. 20
  作者：Grignard、Perrichon

  DOI：——

  日期：——
• Sonogashira Coupling Reaction with Diminished Homocoupling
  作者：Arumugasamy Elangovan、Yu-Hsiang Wang、Tong-Ing Ho

  DOI：10.1021/ol034320+

  日期：2003.5.1

  The side product from homocoupling reaction of two terminal acetylenes in the Sonogashira reaction can be reduced to about 2% using an atmosphere of hydrogen gas diluted with nitrogen or argon. Terminal arylethynes, diarylethynes, and a few new arylpyridylethynes with donor substituents have been synthesized in very good yields. Comparative control experiments suggest that the homocoupling yield is determined by concentration of both catalyst and oxygen.