1-(4-methoxy-benzyl)-1,3-dihydrobenzoimidazol-2-one | 25914-25-4

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 苯并咪唑类
• 英文名称: 1-(4-methoxy-benzyl)-1,3-dihydrobenzoimidazol-2-one
• 英文别名: 1-(4-methoxybenzyl)-1,3-dihydrobenzoimidazol-2-one；1-(4-methoxy-benzyl)-1,3-dihydro-benzoimidazol-2-one；1-(p-Methoxybenzyl)benzimidazolon；3-[(4-methoxyphenyl)methyl]-1H-benzimidazol-2-one
• CAS: 25914-25-4
• 化学式: C₁₅H₁₄N₂O₂
• 分子量: 254.288
• InChiKey: KZSLEAXWQGKIKU-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  19
• 可旋转键数：
  3
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.13
• 拓扑面积：
  41.6
• 氢给体数：
  1
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  在 盐酸羟胺 、 三乙胺 、 triphenylphospine diiodide 、 sodium hydroxide 作用下， 以 乙醇 、 二氯甲烷 为溶剂， 反应 0.08h， 生成 1-(4-methoxy-benzyl)-1,3-dihydrobenzoimidazol-2-one
  参考文献：
  名称：

  Ph3P-I2介导的异羟肟酸反应直接合成N-单取代苯并咪唑-2-酮

  摘要：

  报道了一种通过Ph 3 P-I 2促进的异羟肟酸反应合成苯并咪唑酮的简便方法。在 O 活化异羟肟酸的 Lossen 型重排后，原位生成的异氰酸酯受到邻N-亲核试剂的分子内攻击，在温和条件下以良好的收率产生环化产物。该方法允许使用易于获得的起始材料和具有广泛底物范围的低成本试剂直接制备 N-单取代衍生物的单一区域异构体。

  DOI：

  10.1055/s-0040-1719897

文献信息

• Copper-catalyzed intramolecular N-arylation of ureas in water: a novel entry to benzoimidazolones
  作者：Nekane Barbero、Mónica Carril、Raul SanMartin、Esther Domínguez

  DOI：10.1016/j.tet.2008.05.072

  日期：2008.7

  The copper-catalyzed intramolecular N-arylation of 2-bromoarylureas performed in water leading to the benzo[d]imidazolone framework is reported. The scope of the methodology presented herein proved to be broad and afforded a significant number of benzoimidazolones in good to excellent yields. The reported protocol is based on the use of Cut and TMEDA acting both as the ligand and as the base in a water solution, which allows for the easy separation of the catalyst containing aqueous phase from the products by simple extraction. Additionally, the N- versus O-arylation competitive processes are also discussed. (c) 2008 Elsevier Ltd. All rights reserved.
• Regiospecific Functionalization of 1,3-Dihydro-2H-benzimidazol-2-one and Structurally Related Cyclic Urea Derivatives
  作者：Nicholas A. Meanwell、Sing Yuen Sit、Jinnian Gao、Henry S. Wong、Qi Gao、Denis R. St. Laurent、Neelakantan Balasubramanian

  DOI：10.1021/jo00111a014

  日期：1995.3

  Methods for selectively protecting one of the degenerate nitrogen atoms of the cyclic urea derivatives 1,3-dihydro-2H-benzimidazol-2-one (6a), 1,3-dihydro-2H-imidazo[4,5-b]pyridin-2-one (11), 1,3-dihydro-2H-imidazo[4,5-b]quinolin-2-ones (20), 1,3-dihydro-2H-imidazo[4,5-c]pyridin-2-one (22), and 1,3-dihydro-4-phenyl-2H-imidazol-2-one (27) were developed. Heating these cyclic ureas with ethyl 2-pyridyl carbonate in the presence of a base in CH3CN at reflux or DMF at 100 degrees C cleanly provided the monoethoxycarbonyl derivatives 7a, 12, 21, 23, and 28, respectively. Alternatively, treatment of 6a with an excess of diethyl pyrocarbonate or di-tert-butyl dicarbonate afforded the bis-alkoxycarbonyl derivatives 8a and 8b, respectively, which underwent disproportionation to 7a and 7b upon heating with 1 mol equiv of 6a and K2CO3 in CH3CN at reflux. The regiochemistry of the introduction of alkoxycarbonyl groups to benzimidazol-2-one derivatives was not significantly influenced by an electron-withdrawing (CF3, 6b) or an electron-donating (OCH3, 6c) substituent at C-5 of the heterocyclic ring. However, the reaction was found to be sensitive to steric factors since a chlorine substituent ortho to one of the urea N atoms (6e) completely directed the alkoxycarbonyl moiety to the less sterically encumbered N atom, affording a single product (7f, 7g). Alkylation of 7a-g proceeded efficiently to provide products 10a-10ag after removal of the protecting group. Halogenation of monoprotected benzimidazol-2-one 7a occurred regiospecifically to give the monohalo derivatives 7h, 7i, and 7k, the identity of which were readily established from the characteristic chemical shift and spin coupling pattern in their 1H NMR spectra. A protecting group interchange strategy that took advantage of the distinctive chemical reactivities of the EtO(2)C and t-BuO(2)C protecting groups toward isopropylamine was developed that provided access to the isomerically substituted series of monohalo, mono-N-alkylated benzimidazol-2-ones 71 and 7m. The efficient derivatization of the unprotected N atom of these monoprotected cyclic urea derivatives was accomplished by treating with activated and unactivated halides in the. presence of K2CO3 or exposure to alcohols under Mitsunobu conditions. In several cases, mixtures of O- and N-alkylated products were produced which were readily separated by chromatography. Alkylation of 7h with activated halides, using K2CO3 in CH3CN at reflux, occurred without protecting group equilibration; however, a mixture of isomeric alkylated products was obtained when 7h was heated at 110 degrees C in DMF with cyclohexylmethyl bromide in the presence of K2CO3 as the base. Derivatization of 7h under Mitsunobu reaction conditions proceeded with retention of the topological substituent relationships. Subsequent removal of the alkoxycarbonyl moiety afforded monoalkylated cyclic urea derivatives.
• Efficient Access to Cyclic Ureas via Pd-Catalyzed Cyclization
  作者：Mark McLaughlin、Michael Palucki、Ian W. Davies

  DOI：10.1021/ol061233j

  日期：2006.7.1

  An efficient regioselective method for the preparation of structurally diverse imidazopyridinones and benzoimidazolones starting from readily available and economical starting materials is described. High-yielding reductive alkylation of electron-deficient o-haloarylamines followed by treatment with inexpensive N-chlorosulfonyl isocyanate afforded primary ureas in good overall yields. A Pd-catalyzed urea cyclization reaction furnished imidazopyridinones and benzoimidazolones in excellent yields. Overall, the developed chemistry provides rapid access to pharmaceutically important heterocyclic compounds with high efficiency.
• Direct Synthesis of N-Monosubstituted Benzimidazol-2-ones via Ph3P–I2-Mediated Reaction of Hydroxamic Acids
  作者：Wong Phakhodee、Nittaya Wiriya、Dolnapa Yamano、Surat Hongsibsong、Mookda Pattarawarapan

  DOI：10.1055/s-0040-1719897

  日期：2022.9

  A facile approach for the synthesis of benzimidazolones via a Ph3P–I2 promoted reaction of hydroxamic acids is reported. Upon Lossen-type rearrangement of the O-activated hydroxamic acids, the in situ generated isocyanates undergo an intramolecular attack by ortho N-nucleophiles producing the cyclized products in good yields under mild conditions. The method allows the direct preparation of a single

  报道了一种通过Ph 3 P-I 2促进的异羟肟酸反应合成苯并咪唑酮的简便方法。在 O 活化异羟肟酸的 Lossen 型重排后，原位生成的异氰酸酯受到邻N-亲核试剂的分子内攻击，在温和条件下以良好的收率产生环化产物。该方法允许使用易于获得的起始材料和具有广泛底物范围的低成本试剂直接制备 N-单取代衍生物的单一区域异构体。