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相关概念视频

Fischer Projections02:18

Fischer Projections

17.3K
Learning to draw Fischer projections of molecules and understanding their relevance plays a crucial role in the visual depiction of organic molecules. A Fischer projection is a two-dimensional projection on a planar surface to simplify the three-dimensional wedge–dash representation of molecules. This is especially helpful in the case of molecules with multiple chiral centers that can be difficult to draw. Here, all the bonds of interest are represented as horizontal or vertical lines. While...
17.3K
Space Trusses01:25

Space Trusses

1.4K
A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. The space truss is widely used in various construction projects due to its adaptability and capacity to withstand complex loads.
At the core of a space truss lies the fundamental unit known as the tetrahedron. This structure is composed of six members that form a three-dimensional shape...
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Space Trusses: Problem Solving01:29

Space Trusses: Problem Solving

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A space truss is a three-dimensional counterpart of a planar truss. These structures consist of members connected at their ends, often utilizing ball-and-socket joints to create a stable and versatile framework. Due to its adaptability and capacity to withstand complex loads, the space truss is widely used in various construction projects.
Consider a tripod consisting of a tetrahedral space truss with a ball-and-socket joint at C. Suppose the height and lengths of the horizontal and vertical...
945
Structural Steel Products01:24

Structural Steel Products

740
Structural steel products are created within a structural mill. The process begins with a beam blank that is reheated and then fed through a series of rollers. These rollers progressively shape the metal into its final form. Adjusting the spacings between the rollers allows for the production of different sections with the same nominal dimensions.
Once shaped, the steel's final form emerges as a continuous length, which is then segmented by a hot saw into manageable pieces. These segments...
740
Stereoisomers02:32

Stereoisomers

19.0K
On the basis of mirror symmetry, stereoisomers of an organic molecule can be further classified into diastereomers and enantiomers. Diastereomers are stereoisomers that are not mirror images of each other. Substituted alkenes, such as the cis and trans isomers of 2-butene, are diastereomers, as these molecules exhibit different spatial orientations of their constituent atoms, are not mirror images of each other, and do not interconvert. Here, the interconversion is suppressed due to...
19.0K
Plastic Deformations of Members with a Single Plane of Symmetry01:21

Plastic Deformations of Members with a Single Plane of Symmetry

419
When a structural member undergoes plastic deformation due to bending, it is crucial to understand the position of the neutral axis and the stress distribution. This member, characterized by a single plane of symmetry, exhibits a uniform stress distribution, with negative stress above the neutral axis and positive stress below. Notably, the neutral axis does not align with the centroid of the cross-section. This misalignment is typical in cases where the cross-section is not rectangular or...
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相关实验视频

Updated: Mar 12, 2026

Coral Reef Arks: An In Situ Mesocosm and Toolkit for Assembling Reef Communities
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通过精简的安装来构建立体P(V) 平台.

Jing-Ming Zhang1, Shi-Feng Tao1, Xing-Kai Zhao1

  • 1School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China; State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Shanghai 200032, China.

Science bulletin
|March 10, 2026
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种简化方法,可以从简单的前体中创建复杂的 (V) 立体中心. 这种新方法简化了对药物和农业至关重要的分子的合成,并有可能产生新的杀菌剂.

关键词:
生物活性分子合成杀菌剂的发现 杀菌剂的发现P(V) 是一个立体中心.这是POCl ((3))简化了安装的流程.

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科学领域:

  • 有机化学 有机化学
  • 不对称的合成方法
  • 药用化学 医学化学

背景情况:

  • 完全异原子替代 (((V) 立体中心在制药,农业化学品和催化中至关重要.
  • 创建这些立体中心的现有方法通常涉及复杂的多步合成,合辅助或分辨率技术,限制了效率和可访问性.
  • 需要更直接,更强大的催化不对称方法来合成这些有价值的 (V) 化合物.

研究的目的:

  • 开发一个精简和高效的战略,以安装完全异原子替代的立体中心.
  • 为了证明新方法的广泛适用性,使用多种不同的核友和产生各种立体中心.
  • 展示该协议在合成生物活性分子和评估其潜在应用方面的实用性,例如在农业中.

主要方法:

  • 一个新的,精简的安装策略,从氧化 (POCl) 开始.
  • 使用了13种不同的N-,O-和S基核友来与POCl3反应.
  • 准备了六种不同类型的 (V) 立体中心,有100多个例子证明了该方法的范围和可靠性.

主要成果:

  • 通过使用简单而直接的协议,成功合成了一系列完全异原子替代 (V) 立体中心.
  • 该方法被证明是通用的和可靠的,通过制备超过100种不同的化合物来证明这一点.
  • 将该协议应用于十二种生物活性分子和类型的简要合成,确定了两种新的潜在真菌杀菌剂候选者.

结论:

  • 开发的协议提供了一种高效和简化的方法,可以从易于获得的原始材料中访问各种 (V) 立体中心.
  • 合成方法是多功能和可靠的,促进了复杂分子的各种应用的制备.
  • 抗真菌评估强调了立体化学的重要性,并确定了有希望的新真菌杀菌剂候选者,强调了研究的实际实用性.