1,3-bis(2,6-diethylphenyl)urea | 107676-65-3

• 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: 1,3-bis(2,6-diethylphenyl)urea
• 英文别名: N,N'-di(2,6-diethylphenyl)urea
• CAS: 107676-65-3
• 化学式: C₂₁H₂₈N₂O
• 分子量: 324.466
• InChiKey: GNKVSBGOEZBKRE-UHFFFAOYSA-N

物化性质

• 熔点：
  286-288 °C
• 沸点：
  382.4±42.0 °C(Predicted)
• 密度：
  1.077±0.06 g/cm3(Predicted)

计算性质

• 辛醇/水分配系数(LogP)：
  4.8
• 重原子数：
  24
• 可旋转键数：
  6
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.38
• 拓扑面积：
  41.1
• 氢给体数：
  2
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  1,3-bis(2,6-diethylphenyl)urea 在 dinitrogen tetraoxide 作用下， 以 N,N-二甲基甲酰胺 为溶剂， 反应 2.0h， 以66%的产率得到1,3-bis(2,6-diethylphenyl)nitrosourea
  参考文献：
  名称：

  Substituent effects on nitrosation of 1,3-diarylureas with nitrosyl chloride, dinitrogen trioxide, and dinitrogen tetroxide.

  摘要：

  制备了28个对位取代和11个邻位取代的1,3-二芳基脲。测得的质子核磁共振（1H-NMR）谱图用于评估对位取代脲脲基质子的酸性并估计邻位取代分子的构象。两个脲基质子的化学位移和酸度受1,3-二芳基脲中两个对位取代基的加和性控制。16个对位取代二芳基脲与气体亚硝化试剂（三氧化二氮、四氧化二氮或亚硝酰氯）经亚硝化反应得到不稳定的1,3-二芳基-1-亚硝基脲[R1-C6H4-N(NO)-CO-NH-C6H4-R2]和1,3-二芳基-3-亚硝基脲[R1-C6H4-NH-CO-N(NO)-C6H4-R2]异构体混合物。每种亚硝化脲的异构体比例与原始脲1H-NMR谱图中两个脲基质子化学位移差（d[NH]）相关。当d[NH]低于0.25 ppm（用NOCl）或0.45 ppm（用N2O3）时，获得了较好的线性关系（r(NOCl) = 0.943，n = 11；r(N2O3) = 0.869，n = 15）。当d[NH]高于0.25 ppm（用NOCl）或0.45 ppm（用N2O3）时，1-亚硝化异构体[R1-C6H4-N(NO)-CO-NH-C6H4-R2]是唯一产物。这些原理不能扩展到四氧化二氮。13个对位取代二芳基脲仅得到1-或3-亚硝化脲基衍生物作为唯一产物，只有4个得到亚硝化异构体混合物。测定了5种邻位取代1,3-二芳基脲的1H-NMR谱图用于构象分析。它们的构象似乎与对位取代二芳基脲不同。11个邻位取代1,3-二芳基脲与亚硝酰氯和四氧化二氮进行亚硝化反应。在许多情况下，亚硝基主要引入空间位阻较小的脲基氮，得到了1-和3-亚硝化脲的异构体混合物。

  DOI：

  10.1248/cpb.34.1950
• 作为产物：
  描述：

  1,3-bis(2,6-diethylphenyl)-thiourea 在 sodium chlorite 作用下， 反应 0.75h， 以96%的产率得到1,3-bis(2,6-diethylphenyl)urea
  参考文献：
  名称：

  New Synthetic Strategy for Urea Herbicides

  摘要：

  This work describes an effective and a safe procedure for the preparation of commercially applicable trisubstituted ureas derived from their thio analogues which result from the thiuram disulfides in quantitative yields.

  DOI：

  10.1080/00397919708003392

文献信息

• N,N-Disubstituted Ureas: Influence of Substituents on the Formation of Supramolecular Polymers
  作者：Frédéric Lortie、Sylvie Boileau、Laurent Bouteiller

  DOI：10.1002/chem.200304801

  日期：2003.7.7

  Symmetrical N,N'-disubstituted ureas have been synthesized and characterized. Among them, the branched dialkylureas prepared are highly soluble in organic media. Moreover, the solutions obtained are very viscous in heptane, if the branched alkyl groups are not too bulky (i.e. a methyl group on the alpha carbon, or an ethyl group on the beta carbon). Due to the strong, bifurcated hydrogen bonds between

  已经合成并表征了对称的N，N'-二取代脲。其中，制备的支链二烷基脲在有机介质中高度可溶。此外，如果支链烷基基团不太庞大（即，α碳上的甲基或β碳上的乙基），则所得溶液在庚烷中的粘度非常高。由于脲部分之间的牢固的，分叉的氢键，形成了线性的超分子聚合物。这些超分子聚合物的缔合度已经通过FTIR光谱法确定。
• The Application of<i>N</i>-Substituted Trichloroacetamides as<i>in situ</i>Isocyanate Generating Reagents for the Synthesis of Acylureas and Sulfonylureas
  作者：Ivanka A. Atanassova、Jan S. Petrov、Nikola M. Mollov

  DOI：10.1055/s-1987-28067

  日期：——

  In dimethylsulfoxide solution in the presence of excess of powdered sodium hydroxide, N-subsituted trichloroacetamides 1 are used as in situ isocyanate generating reagents which can react with carboxamides or sulfonamides 2 to afford acylureas or sulfonylureas 3.

  在过量粉末状氢氧化钠存在的二甲基亚砜溶液中，N-取代的三氯乙酰胺1被用作原位异氰酸酯生成试剂，能够与羧酰胺或磺酰胺2反应，生成酰基脲或磺酰脲3。
• ATANASSOVA, I. A.;PETROV, J. S.;MOLLOV, N. M., SYNTHESIS,(1987) N 8, 734-736
  作者：ATANASSOVA, I. A.、PETROV, J. S.、MOLLOV, N. M.

  DOI：——

  日期：——
• Substituent effects on nitrosation of 1,3-diarylureas with nitrosyl chloride, dinitrogen trioxide, and dinitrogen tetroxide.
  作者：MAKOTO MIYAHARA

  DOI：10.1248/cpb.34.1950

  日期：——

  Twenty-eight para-substituted and eleven ortho-substituted 1, 3-diarylureas were prepared.Their proton nuclear magnetic resonance (1H-NMR) spectra were measured to evaluate the acidity of the ureido protons in the para-substituted ureas, and to estimate the conformations of ortho-substituted molecules. The chemical shifts and acidities of two ureido protons were additively controlled by the two para-substituents in the 1, 3-diarylureas. The sixteen para-substitued diarylureas were nitrosated with gaseous nitrosating reagents (dinitrogen trioxide, dinitrogen tetroxide or nitroxyl chloride) to give unstable isomeric mixtures of 1, 3-diaryl-1-nitrosoureas [R1-C6H4-N(NO)-CO-NH-C6H4-R2] and 1, 3-diaryl-3-nitrosoureas [R1-C6H4-NH-CO-N(NO)-C6H4-R2]. The isomer ratio of each nitrosated urea was correlated with the difference between the chemical shifts (d[NH]) of the two ureido protons in the 1H-NMR spectrum of the starting urea. When d[NH] was below 0.25 ppm (with NOCl) or 0.45 ppm (with N2O3), good linearity was obtained (r(NOCl)=0.943, n=11; r(N2O3)=0.869, n=15). When d[NH] was over 0.25 ppm (NOCl) or 0.45 ppm (N2O3), the 1-nitrosated isomer [R1-C6H4-N(NO)-CO-NH-C6H4-R2] was the sole product. These principles ould not be extended to dinitrogen tetroxide.Thirteen para-substituted diarylureas gave 1- or 3-nitrosated ureido derivatives as sole products and only four gave nitrosated isomeric mixtures.The 1H-NMR spectra of 5 types of ortho-substituted 1, 3-diarylureas were measured for comformational analysis. Their conformations seem to be different from those of para-substituted diarylureas. Eleven ortho-substituted 1, 3-diarylureas were nitrosated with nitrosyl chloride and dinitrogen tetroxide. In many cases, the nitroso group was predominantly introduced at the ureido nitrogen, which is less hindered sterically, and isomeric mixtures of 1- and 3-nitrosated ureas were obtained.

  制备了28个对位取代和11个邻位取代的1,3-二芳基脲。测得的质子核磁共振（1H-NMR）谱图用于评估对位取代脲脲基质子的酸性并估计邻位取代分子的构象。两个脲基质子的化学位移和酸度受1,3-二芳基脲中两个对位取代基的加和性控制。16个对位取代二芳基脲与气体亚硝化试剂（三氧化二氮、四氧化二氮或亚硝酰氯）经亚硝化反应得到不稳定的1,3-二芳基-1-亚硝基脲[R1-C6H4-N(NO)-CO-NH-C6H4-R2]和1,3-二芳基-3-亚硝基脲[R1-C6H4-NH-CO-N(NO)-C6H4-R2]异构体混合物。每种亚硝化脲的异构体比例与原始脲1H-NMR谱图中两个脲基质子化学位移差（d[NH]）相关。当d[NH]低于0.25 ppm（用NOCl）或0.45 ppm（用N2O3）时，获得了较好的线性关系（r(NOCl) = 0.943，n = 11；r(N2O3) = 0.869，n = 15）。当d[NH]高于0.25 ppm（用NOCl）或0.45 ppm（用N2O3）时，1-亚硝化异构体[R1-C6H4-N(NO)-CO-NH-C6H4-R2]是唯一产物。这些原理不能扩展到四氧化二氮。13个对位取代二芳基脲仅得到1-或3-亚硝化脲基衍生物作为唯一产物，只有4个得到亚硝化异构体混合物。测定了5种邻位取代1,3-二芳基脲的1H-NMR谱图用于构象分析。它们的构象似乎与对位取代二芳基脲不同。11个邻位取代1,3-二芳基脲与亚硝酰氯和四氧化二氮进行亚硝化反应。在许多情况下，亚硝基主要引入空间位阻较小的脲基氮，得到了1-和3-亚硝化脲的异构体混合物。
• New Synthetic Strategy for Urea Herbicides
  作者：K. Ramadas、N. Janarthanan

  DOI：10.1080/00397919708003392

  日期：1997.7

  This work describes an effective and a safe procedure for the preparation of commercially applicable trisubstituted ureas derived from their thio analogues which result from the thiuram disulfides in quantitative yields.