相关实验视频
Updated: May 14, 2025

10:09
Operation of the Collaborative Composite Manufacturing CCM System
Published on: October 1, 2019
6.5K
Cs2CO3-N,N-Dimethylacetamide-促进了通过核性替代通过a-Bromo Ester通过核性替代进行化
Xinyan Song1, Mingxin Li1, Haihong Bao1
1College of Pharmacy, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China.
ChemistryOpen
|May 13, 2025
概括
一种新方法高效地利用碳酸-二甲基胺系统从甲基酸和α-烯酸中合成乳酸衍生物. 这种核替代反应在温和条件下为各种化合物提供了一条有价值的途径.
科学领域:
- 有机化学 有机化学
- 合成化学 合成化学
背景情况:
- 核替代反应是有机合成的基础.
- 开发有效的合成有价值有机化合物的方法至关重要.
研究的目的:
- 报告一种用于合成乳酸衍生物的新型核替代反应.
- 探索在这种转化过程中使用碳酸-二甲基胺 (Cs2CO3-DMA) 系统.
主要方法:
- 酸与α-乙烯 Ester 的反应.
- 使用一个Cs2CO3-DMA催化系统.
- 反应条件的优化,以温和和高效.
主要成果:
- 成功合成了34种不同的乳酸衍生物.
- 取得良好的至优秀的收益率,高达97%.
- 证明反应在温和条件下进行.
结论:
- Cs2CO3-DMA系统为合成乳酸衍生物提供了一条有效的途径.
- 离子双极相互作用可能在SN2反应机制中发挥重要作用.
- 这种方法为合成有机化学工具包提供了宝贵的补充.
相关概念视频
Statistical Analysis System (SAS)
79
SAS, short for Statistical Analysis System, is a powerful data analysis, management, and visualization tool. Developed by the SAS Institute in the early 1970s, SAS has evolved into a comprehensive software suite used across various industries for statistical analysis, business intelligence, and predictive modeling.
Applications: SAS finds applications in numerous fields, including healthcare for clinical trial analysis, finance for risk assessment, marketing for customer data analysis, and...
Applications: SAS finds applications in numerous fields, including healthcare for clinical trial analysis, finance for risk assessment, marketing for customer data analysis, and...
79
Control Systems
962
Control systems are everywhere in contemporary society, influencing diverse applications from aerospace to automated manufacturing. These systems can be found naturally within biological processes, such as blood sugar regulation and heart rate adjustment in response to stress, as well as in man-made systems like elevators and automated vehicles. A control system is essentially a network of subsystems and processes that collaboratively convert specific inputs into desired outputs.
At the heart...
At the heart...
962
Control Systems: Applications
525
Electrical engineering plays a pivotal role in our daily lives, with control systems at the heart of many applications, from home appliances to sophisticated space shuttles. Control systems manage and regulate the behavior of devices and processes, ensuring they function safely, correctly, and efficiently.
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...
In modern vehicles, control systems manage various functions to enhance performance and safety. The steering wheel and accelerator are primary inputs in a car's control system. The...
525
Visual System
432
Light enters the eye through the cornea, a transparent, dome-shaped surface covering the surface of the eyeball that helps to direct and focus incoming light. This light is then channeled toward the pupil, an adjustable opening whose size is controlled by the iris. The iris, a pigmented muscle, regulates the amount of light entering the eye by contracting or dilating the pupil, thereby ensuring optimal light levels for clear vision.
Once through the pupil, the light passes through the lens, a...
Once through the pupil, the light passes through the lens, a...
432
Statgraphics
93
Statgraphics is a comprehensive statistical software suite designed for both basic and advanced data analysis. Originating in 1980 at Princeton University under Dr. Neil W. Polhemus, it was one of the pioneering tools for statistical computing on personal computers, with its public release in 1982 marking an early milestone in data science software. Over the years, it has evolved into a robust platform for data science, offering tools for regression analysis, ANOVA, multivariate statistics,...
93
Stereotype Content Model
13.9K
The Stereotype Content Model (SCM) was first proposed by Susan Fiske and her colleagues (Fiske, Cuddy, Glick & Xu, 2002; see also Fiske, 2012 and Fiske, 2017). The SCM specifies that when someone encounters a new group, they will stereotype them based on two metrics: warmth—or that group’s perceived intent, and how likely they are to provide help or inflict harm—and competence—or their ability to carry out that objective. Depending on the warmth-competence...
13.9K

