1-cyclohexyl-4,5-dimethylimidazole 3-oxide | 215675-46-0

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 1-cyclohexyl-4,5-dimethylimidazole 3-oxide
• 英文别名: 1-Cyclohexyl-4,5-dimethyl-3-oxidoimidazol-3-ium
• CAS: 215675-46-0
• 化学式: C₁₁H₁₈N₂O
• 分子量: 194.277
• InChiKey: YOFNRHRQXYYQBF-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  14
• 可旋转键数：
  1
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.73
• 拓扑面积：
  30.4
• 氢给体数：
  0
• 氢受体数：
  1

反应信息

• 作为反应物：
  描述：

  1-cyclohexyl-4,5-dimethylimidazole 3-oxide 在 镍 作用下， 以 乙醇 为溶剂， 以86%的产率得到1-cyclohexyl-4,5-dimethyl-1H-imidazole
  参考文献：
  名称：

  Exploration of 4,5-dimethyl-1H-imidazole N-oxide derivatives in the synthesis of new achiral and chiral ionic liquids

  摘要：

  New 1-alkoxy-3-alkyl-4,5-dimethylimidazolium bromides were synthesized by alkylation of the corresponding 1-alkylimidazole 3-oxides, which were conveniently prepared via condensation of alpha-(hydroxyimino)ketones, primary aliphatic amines, and formaldehyde. By using enantiomerically pure chiral amines, optically active imidazolium Salts were obtained. Treatment with sodium tetrafluoroborate in acetone yielded the corresponding imidazolium tetrafluoroborates. All these compounds, with only one exception, were obtained as oils, which are considered as potential ionic liquids and 'chiral ionic liquids'. The reduction of the chiral or non-chiral 1-alkylimidazole 3-oxides with Raney-Ni, followed by alkylation with alkyl bromides and subsequent ion exchange to tetra fluoroborates, gave the corresponding 1,3-dialkylimidazolium salts, most of them showing properties of ionic liquids. The alkylation of 1-butyl-4,5-dimethylimidazole 3-oxide and the corresponding imidazole, respectively, with 1,3-dibromopropane led to the first bis-imidazolium dibromides and bis-tetrafluoroborates. (c) 2009 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.tetasy.2009.02.053
• 作为产物：
  描述：

  六氢-1,3,5-三环己基-S-三嗪 、 二乙酰一肟 以 乙醇 为溶剂， 生成 1-cyclohexyl-4,5-dimethylimidazole 3-oxide
  参考文献：
  名称：

  Mloston, Grzegorz; Jasinski, Marcin, ARKIVOC, 2011, vol. 2011, # 6, p. 162 - 175

  摘要：

  DOI：

文献信息

• Reactions of 2-Unsubstituted 1 H -Imidazole 3-Oxides with Heterocumulenes and Dimethyl Acetylenedicarboxylate
  作者：Grzegorz Mlostoń、Tomasz Gendek、Heinz Heimgartner

  DOI：10.1016/s0040-4020(00)00449-x

  日期：2000.7

  Reaction of 2-unsubstituted 1H-imidazole 3-oxides with isocyanates, isothiocyanates, and dimethyl acetylenedicarboxylate led to the formation of 2-functionalized imidazole derivatives. Stepwise reaction mechanisms via zwitterionic intermediates are proposed. The intermediate [3+2] cycloadducts stabilize via extrusion of COX or ring opening.

  2-未取代的1 H-咪唑3-氧化物与异氰酸酯，异硫氰酸酯和乙炔二甲酸二甲酯的反应导致形成2-官能化的咪唑衍生物。提出了通过两性离子中间体的逐步反应机理。中间的[3 + 2]环加合物可通过挤出COX或开环来稳定。
• First Examples of Reactions of AzoleN-Oxides with Thioketones: A Novel Type of Sulfur-Transfer Reaction
  作者：Grzegorz Mlostoń、Tomasz Gendek、Heinz Heimgartner

  DOI：10.1002/(sici)1522-2675(19980909)81:9<1585::aid-hlca1585>3.0.co;2-n

  日期：1998.9.9

  The reactions of 1,4,5-trisubstituted imidazole 3-oxides 1a-k with cyclobutanethiones 5a,b in CHCl3 at room temperature give imidazole-2(3H)-thiones 9a-k in high yield. The second product formed in this reaction is 2,2,4,4-tetramethylcyclobutane-1,3-dione (6a; Scheme 2). Similar reactions occur with 1 and adamantanethione (5c) as thiocarbonyl compound, as well as with 1,2,4-triazole-4-oxide derivative 10 and 5a (Scheme 3). A reaction mechanism by a two-step formation of the formal cycloadduct of type 7 via zwitterion 16 is proposed in Scheme 5. Spontaneous decomposition of 7 yields the products of this novel sulfur-transfer reaction. The starting imidazole 3-oxides are conveniently prepared by heating a mixture of 1,3,5-trisubstituted hexahydro-1,3,5-triazines 3 and alpha-(hydroxyimino) ketones 2 in EtOH (cf: Scheme 1). As demonstrated in the case of 9d, a 'one-pot' procedure allows the preparation of 9 without isolation of the imidazole 3-oxides 1. The reaction of Ic with thioketene 12 leads to a mixture of four products (Scheme 4). The minor products, 9c and the ketene 15, result from an analogous sulfur-transfer reaction (Path a in Scheme 5), whereas the parent imidazole 14 and thiiranone 13 are the products of an oxygen-transfer reaction (Path b in Scheme 5).
• Synthesis of Imidazole Derivatives Using 2-Unsubstituted 1H-Imidazole 3-Oxides
  作者：Grzegorz Mlostoń、Małgorzata Celeda、G. K. Surya Prakash、George A. Olah、Heinz Heimgartner

  DOI：10.1002/(sici)1522-2675(20000412)83:4<728::aid-hlca728>3.0.co;2-b

  日期：2000.4.12

  The reaction of 1,4,5-trisubstituted 1H-imidazole 3-oxides 1 with Ac2O in CH2Cl2 at 0-5 degrees leads to the corresponding 1,3-dihydro-2H-imidazol-2-ones 4 in good yields. In refluxing Ac2O, the N-oxides 1 are transformed to N-acetylated 1,3-dihydro-2H-imidazol-2-ones 5. The proposed mechanisms for these reactions are analogous to those for N-oxides of 6-membered heterocycles (Scheme 2). A smooth synthesis of 1H-imidazole-2-carbonitriles 2 starting with 1 is achieved by treatment with trimethylsilanecarbonitrile (Me2SiCN) in CH2Cl2 at 0-5 degrees (Scheme 3).
• Mloston; Gendek; Linden, Polish Journal of Chemistry, 2008, vol. 82, # 8, p. 1561 - 1569
  作者：Mloston、Gendek、Linden、Heimgartner

  DOI：——

  日期：——