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相关概念视频

Five-Membered Heterocyclic Aromatic Compounds: Overview01:13

Five-Membered Heterocyclic Aromatic Compounds: Overview

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Heterocyclic aromatic compounds are cyclic compounds that are aromatic and have one or more heteroatoms—atoms other than carbon, in the ring. Depending upon the number of atoms present in the ring, they can be either five or six-membered. Examples of five-membered heterocyclic aromatic compounds include pyrrole, furan, thiophene, and imidazole. Pyrrole consists of one nitrogen atom having one lone pair of electrons. Furan and thiophene have one oxygen and one sulfur heteroatom,...
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Aromatic Compounds: Overview01:25

Aromatic Compounds: Overview

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In general, the term ‘aromatic’ indicates a pleasant smell or fragrance from fresh flowers, freshly prepared coffee, etc. In the early history of organic chemistry, many benzene derivatives were isolated from the pleasant odor oils of the plants. For example, vanillin was isolated from the oil of vanilla, methyl salicylate from the oil of wintergreen, and cinnamaldehyde from the oil of cinnamon. They all had a pleasant odor; hence the name aromatic was given.
In 1825, Faraday...
10.5K
Aromatic Hydrocarbon Cations: Structural Overview01:18

Aromatic Hydrocarbon Cations: Structural Overview

2.8K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
2.8K
Nomenclature of Aromatic Compounds with a Single Substituent01:23

Nomenclature of Aromatic Compounds with a Single Substituent

8.0K
Benzene is the simplest aromatic hydrocarbon or arene. The IUPAC names for simple monosubstituted benzene derivatives are derived by adding the substituent's name as a prefix to the parent benzene. For example, halobenzene, where the halogen could be fluoro (F), chloro (Cl), bromo (Br), and iodo (I).
8.0K
Aromatic Hydrocarbon Anions: Structural Overview01:18

Aromatic Hydrocarbon Anions: Structural Overview

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Neutral hydrocarbons like cyclopentadiene with an odd number of carbon atoms and one intervening CH2 group in the ring are not aromatic. Cyclopentadiene with 4 π electrons does not satisfy the 4n + 2 π electron rule. Additionally, the intervening CH2 group is sp3 hybridized and lacks a vacant p orbital, thereby interrupting the overlap of p orbitals in a continuous manner and preventing the delocalization of π electrons throughout the ring.
Due to the absence of continuous...
2.7K
Basicity of Heterocyclic Aromatic Amines01:25

Basicity of Heterocyclic Aromatic Amines

5.8K
Heterocyclic amines, where the N atom is a part of an alicyclic system, are similar in basicity to alkylamines. Interestingly, the heterocyclic amine having a nitrogen atom as part of an aromatic ring has much less basicity than its corresponding alicyclic counterpart. For this reason, as presented in Figure 1, piperidine (pKb = 2.8) is significantly more basic than pyridine (pKb = 8.8).
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在以Pyrene为基础的框架内制药相关化合物的结构解.

Mohammad T Chaudhry1, Justin A Newman1, Alfred Y Lee1

  • 1Analytical Research and Development, Merck & Co., Inc., Rahway, New Jersey, 07065, United States of America.

Chemistry (Weinheim an der Bergstrasse, Germany)
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概括

一个新的框架,四 () 甲素酸盐 (G4PYR),有效地封装小分子和活性药物成分 (API) 用于结构分析. 当传统结晶失败时,这种方法有助于确定分子结构.

关键词:
晶体学 晶体学是指结晶学.药品制造业 药品制造业 药品制造业 药品制造业皮勒尼斯金字塔地区的金字塔结构阐明 结构阐明

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科学领域:

  • 材料科学 材料科学 材料科学
  • 晶体学 晶体学是指结晶学.
  • 超分子化学 超分子化学

背景情况:

  • 单晶X射线衍射 (SCXRD) 对于分子结构的确定至关重要,但在抗结晶的小分子和API方面面临挑战.
  • 为了获得高品质的晶体,通常需要共同形成剂,并且在标准结晶条件下,一些化合物可能不稳定.

研究的目的:

  • 引入一种新型的guanidinium-organosulfonate (GS) 框架,即 tetrakis ((guanidinium) pyrenetetrasulfonate (G4PYR),用于封装具有挑战性的小分子和API.
  • 证明G4PYR在形成适用于X射线衍射分析的有序结结构中的实用性.
  • 通过粉末X射线衍射和高通量实验,建立一个调查宿主-客群复合形成的工作流程.

主要方法:

  • 综合和表征的四 ((guanidinium) pyrenetetrasulfonate (G4PYR) 的框架.
  • 用各种小分子和活性药物成分 (API) 进行封装研究.
  • 使用单晶X射线衍射 (SCXRD) 和粉末X射线衍射 (PXRD) 的结构分析.
  • 为主机-客户复杂调查进行高通量实验.

主要成果:

  • G4PYR框架成功地封装了一系列功能化的小分子 (例如,甲,胺) 和生物相关化合物 (例如,利多卡因,罗皮尼罗尔,乌拉,胺,腺,胺).
  • G4PYR框架形成了有序的键网络,具有可预测的烯-烯距离.
  • 已证明适用于以悬挂组为目标的基于arene的API的适用性.
  • 开发并验证了主机-客户复杂形成研究的工作流程.

结论:

  • 四氧化 (G4PYR) pyrenetetrasulfonate (G4PYR) 为难以结晶的小分子和API的结构确定提供了一个强大的平台.
  • 在G4PYR框架提供了一个有前途的策略,用于无协同构造器的晶体工程和结构分析.
  • 提出的工作流允许有效地调查宿主-客体复合体的形成,推动药物发现和材料科学.