1-(4-bromobenzyl)-4,5-dihydro-1H-pyrazole | 1422526-65-5

• 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-bromobenzyl)-4,5-dihydro-1H-pyrazole
• 英文别名: 2-[(4-Bromophenyl)methyl]-3,4-dihydropyrazole；2-[(4-bromophenyl)methyl]-3,4-dihydropyrazole
• CAS: 1422526-65-5
• 化学式: C₁₀H₁₁BrN₂
• 分子量: 239.115
• InChiKey: CIFJNGFCCZPHRT-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  2.2
• 重原子数：
  13
• 可旋转键数：
  2
• 环数：
  2.0
• sp3杂化的碳原子比例：
  0.3
• 拓扑面积：
  15.6
• 氢给体数：
  0
• 氢受体数：
  2

反应信息

• 作为产物：
  描述：

  对溴苯甲醛 在 iron(III) chloride 、 sodium azide 、 三乙胺 作用下， 以 四氢呋喃 、 甲醇 、 N,N-二甲基甲酰胺 为溶剂， 100.0 ℃ 、101.33 kPa 条件下， 反应 18.5h， 生成 1-(4-bromobenzyl)-4,5-dihydro-1H-pyrazole
  参考文献：
  名称：

  Fe(III)-Catalyzed Aerobic Intramolecular N–N Coupling of Aliphatic Azides with Amines

  摘要：

  An Fe(III)-catalyzed intramolecular N-N coupling of aliphatic azidoamines that forms diverse five-and six-membered semisaturated diazoheterocycles using air as an oxidant is reported, providing an alternative to hydrazine-based methods. Mechanistic studies suggest that a N-radical induced intramolecular homolytic substitution (S(H)2) is involved in ring closure. The power of this N-N bond-forming method is also demonstrated by using it as the final step in a total synthesis of (-)-newbouldine.

  DOI：

  10.1021/acs.orglett.9b01396

文献信息

• Generation and metathesis of azomethine imines in reaction of 6-aryl-1,5-diazabicyclo[3.1.0]hexanes with het(aryl)methylidenemalononitriles
  作者：M. I. Pleshchev、V. Yu. Petukhova、V. V. Kuznetsov、D. V. Khakimov、T. S. Pivina、Yu. V. Nelyubina、N. N. Makhova

  DOI：10.1007/s11172-013-0143-9

  日期：2013.4

  give in situ new azomethine imines inaccessible by common synthetic methods. New azomethine imines are detected as pyrazolines formed via a 1,4-H shift and trapped by the [3+2] cycloaddition with various dipolarophiles to yield 1,5-diazabicyclo[3.3.0]octane derivatives bearing pharmacophoric heterocycles, e.g. furan, nitrofuran, thiophene, and indole. The best results are achieved in the Et2O·BF3-catalyzed

  发现了偶氮甲碱亚胺的新复分解反应。6-芳基-1,5-二氮杂双环[3.1.0]己烷的催化或热二氮丙啶开环导致偶氮甲亚胺与杂（芳基）亚甲基丙二腈进一步反应，原位生成新的偶氮甲亚胺，这是普通合成方法无法获得的。新的偶氮甲碱亚胺被检测为通过 1,4-H 位移形成的吡唑啉，并通过 [3+2] 环加成与各种偶极试剂捕获，产生带有药效杂环的 1,5-二氮杂双环 [3.3.0] 辛烷衍生物，例如呋喃，硝基呋喃、噻吩和吲哚。在 Et2O·BF3 催化的离子液体反应中取得了最好的结果。
• Metathesis of Azomethine Imines in Reaction of 6-aryl-1,5-Diazabicyclo[3.1.0]Hexanes with (Het)Arylidenemalononitriles
  作者：Mikhail I. Pleshchev、Vera Yu. Petukhova、Vladimir V. Kuznetsov、Dmitriy V. Khakimov、Tatyana S. Pivina、Marina I. Struchkova、Yulia V. Nelyubina、Nina N. Makhova

  DOI：10.1016/j.mencom.2013.01.012

  日期：2013.1

  Ring opening in 6-aryl-1,5-diazabicyclo[3.1.0]hexanes gives cyclic azomethine imines which are prone to exchange of arylidene moiety with (het)arylidenemalononitriles to form the metathesis products being new azomethine imines. These species were fixed as pyrazolines due to the 1,4-H shift or trapped by dimethyl acetylenedicarboxylate or CS2.
• Fe(III)-Catalyzed Aerobic Intramolecular N–N Coupling of Aliphatic Azides with Amines
  作者：Yue Zhang、Dongyu Duan、Ying Zhong、Xin-Ai Guo、Jiawei Guo、Jing Gou、Ziwei Gao、Binxun Yu

  DOI：10.1021/acs.orglett.9b01396

  日期：2019.7.5

  An Fe(III)-catalyzed intramolecular N-N coupling of aliphatic azidoamines that forms diverse five-and six-membered semisaturated diazoheterocycles using air as an oxidant is reported, providing an alternative to hydrazine-based methods. Mechanistic studies suggest that a N-radical induced intramolecular homolytic substitution (S(H)2) is involved in ring closure. The power of this N-N bond-forming method is also demonstrated by using it as the final step in a total synthesis of (-)-newbouldine.