3,5-bis(3,4,5-trimethoxyphenyl)-1H-pyrazole | 851729-28-7

• 分子结构分类: 有机化合物 - 有机杂环化合物 - 唑类
• 英文名称: 3,5-bis(3,4,5-trimethoxyphenyl)-1H-pyrazole
• 英文别名: 3,5-bis(3,4,5-trimethoxyphenyl)pyrazole
• CAS: 851729-28-7
• 化学式: C₂₁H₂₄N₂O₆
• 分子量: 400.431
• InChiKey: BITOSIHBHIWPFY-UHFFFAOYSA-N

计算性质

• 辛醇/水分配系数(LogP)：
  3.4
• 重原子数：
  29
• 可旋转键数：
  8
• 环数：
  3.0
• sp3杂化的碳原子比例：
  0.29
• 拓扑面积：
  84.1
• 氢给体数：
  1
• 氢受体数：
  7

反应信息

• 作为反应物：
  描述：

  3,5-bis(3,4,5-trimethoxyphenyl)-1H-pyrazole 、 di(rhodium)tetracarbonyl dichloride 以 二氯甲烷 为溶剂， 生成 cis-[RhCl(CO)2(3,5-bis(3,4,5-trimethoxyphenyl)pyrazole)]
  参考文献：
  名称：

  Supramolecular Structures and Columnar Mesophase Induction in Nondiscoid Pyrazoles by Complexation to Rhodium(I)

  摘要：

  Several new cis-[RhCl(CO)(2)(Ln)] complexes have been prepared using different polycatenar pyrazole ligands (Ln) in order to obtain columnar liquid crystalline arrangements. The topology of the ligand plays an essential role, and a mesophase is induced at room temperature from a nonmesogenic pyrazole only when it is symmetrically substituted with six decyloxy chains. The single-crystal structure of a methoxy-substituted analogue, 3,5-bis(3,4,5-trimethoxyphenyl) pyrazole, is formed by globular tetrameric structures held together by H-bonding. However, parallel dimers are present in the corresponding cis-chlorodicarbonylrhodium(I) complex, a situation that explains the induction of a columnar mesophase in the decyloxy-substituted complex. The XRD pattern of the mesophase is consistent with a hexagonal symmetry in which the columns are formed by molecules assembled in an antiparallel mode. The crystal-to-mesophase transition was also detected by spectroscopic techniques as a shift in the IR carbonyl stretching bands and the appearance of a charge-transfer band in the absorption spectrum with thermochromic behavior.

  DOI：

  10.1021/ic0614216
• 作为产物：
  描述：

  (2E)-1-(3',4',5'-trimethoxyphenyl)-3-(3,4,5-trimethoxyphenyl)-2-propen-1-one 在 双氧水 、 potassium carbonate 、 对甲苯磺酸 、 一水合肼 作用下， 以 甲醇 、 水 、 xylene 为溶剂， 反应 6.0h， 生成 3,5-bis(3,4,5-trimethoxyphenyl)-1H-pyrazole
  参考文献：
  名称：

  Synthesis and cytotoxicity of epoxide and pyrazole analogs of the combretastatins

  摘要：

  Twenty-six epoxide and corresponding pyrazole derivatives, of the structurally related chalcones and combretastatin A-4 (CA-4), were synthesized and tested for in vitro cytotoxicity. These molecules were synthesized by epoxidation of the relevant chalcones, followed by reaction with hydrazine. The structures of epoxides 3 and 7, and pyrazole 17, were confirmed by X-ray diffraction studies. The relatively coplanar conformation of a 3',3",4',4",5',5"-hexamethoxypyrazole 17 was in good agreement with the shape for 3',3",4',4",5'-pentamethoxypyrazole 16, which was determined from molecular mechanics optimization. In vitro cytotoxicity of each class of compounds was obtained using a 72 h continuous exposure MTT assay against two murine cancer cell lines; B16 melanoma and L1210 leukemia. The effect of substitution in the A-ring is addressed: three methoxy groups versus two, generally increased cytotoxicity across both cell lines. In the majority of cases, the pyrazoles are generally more active than the epoxides, with the most active, 5-(3"-amino-4"-methoxyphenyl)-3-(3',4',5'-trimethoxyphenyl)pyrazole 21, possessing an IC50 value of 5 and 2.4 mu M (B16 and L1210, respectively). Due to their planar conformations, the pyrazoles are typically less active than the corresponding chalcones, which adopt angular conformations similar to CA-4. B-ring modifications confirmed that in general the amino compounds are more active than the corresponding nitro compounds. Varying the number and orientation of methoxy groups on the A-ring did not produce any significant differences in toxicity in the cell lines studied. (c) 2005 Elsevier Ltd. All rights reserved.

  DOI：

  10.1016/j.bmc.2005.06.028

文献信息

• Synthesis and biological evaluation of chalcones and their derived pyrazoles as potential cytotoxic agents
  作者：B.A. Bhat、K.L. Dhar、S.C. Puri、A.K. Saxena、M. Shanmugavel、G.N. Qazi

  DOI：10.1016/j.bmcl.2005.03.121

  日期：2005.6

  A series of substituted chalcones and their corresponding pyrazoles were synthesized and evaluated for in vitro cytotoxic activity against a panel of human cancer cell lines. Out of 93 compounds screened, 8 compounds, 1s, 3i,j,n, 4i,j,n and 4s, showed marked activity. Compounds 4j,n and 4s were found to be the most promising in this study. SAR is also discussed. (c) 2005 Elsevier Ltd. All rights reserved.
• Synthesis of 3,5‐Diphenyl‐1<i>H</i>‐Pyrazoles
  作者：B. A. Bhat、S. C. Puri、M. A. Qurishi、K. L. Dhar、G. N. Qazi

  DOI：10.1081/scc-200054225

  日期：2005.4.1

  An efficient and convenient synthesis of 3,5-diphenyl-IH-pyrazoles from chalcones by the action of hydrazine hydrate on chalcone-epoxide followed by simultaneous dehydration is reported.
• Tetrahedral Zinc Complexes with Liquid Crystalline and Luminescent Properties:  Interplay Between Nonconventional Molecular Shapes and Supramolecular Mesomorphic Order
  作者：Emma Cavero、Santiago Uriel、Pilar Romero、José Luis Serrano、Raquel Giménez

  DOI：10.1021/ja073639c

  日期：2007.9.1

  Novel metallomesogens with luminescent properties and liquid crystalline behavior at room temperature have been achieved by the preparation of zinc complexes with polycatenar pyrazole and bis(pyrazolyl)methane ligands. Their molecular structures do not have a conventional shape in that they are far from the typical rod-like and flat disc-like geometries of common liquid crystals. They consist of a nonplanar nucleus due to the methylene spacer and/or the coordination to the tetrahedral center, as confirmed by single crystal analysis of the cores. The different numbers and positions of side chains in the pyrazole ligand enabled us to access lamellar and columnar mesophases and, of particular interest, to obtain columnar arrangements at room temperature. Supramolecular models for the organization of the molecules in the mesophases are proposed on the basis of the small-angle XRD diffractograms. The zinc complexes display luminescence in the near UV-blue region with large Stokes shifts. An interplay between non-conventional molecular shapes (due to the tetrahedral core) and the supramolecular mesomorphic order (due to the ligand design) led to materials that interestingly embody two rather opposite properties, a columnar self-organizational ability and luminescence with weak intermolecular interactions.