USDA, University of Connecticut Abstract Research methods that predict Fe bioavailability for humans can be extremely useful in evaluating food fortification strategies, developing Fe-biofortified enhanced staple food crops and assessing the Fe bioavailability of meal plans that include such crops. In this review, research from four recent poultry (Gallus gallus) feeding trials coupled with in …
University of Durham Abstract The synthesis of diazonium salts is historically an important transformation extensively utilized in dye manufacture. However the highly reactive nature of the diazonium functionality has additionally led to the development of many new reactions including several carbon-carbon bond forming processes. It is therefore highly desirable to determine optimum conditions for the …
The discovery of chemical reactions is an inherently unpredictable and time-consuming process. An attractive alternative is to predict reactivity, although relevant approaches, such as computer-aided reaction design, are still in their infancy. Reaction prediction based on high-level quantum chemical methods is complex, even for simple molecules. Although machine learning is powerful for data analysis, its …
Flow electrochemistry is an efficient methodology to generate radical intermediates. An electrochemical flow microreactor has been designed and manufactured to improve the efficiency of electrochemical flow reactions. With this device only little or no supporting electrolytes are needed, making processes less costly and enabling easier purification. This is demonstrated by the facile synthesis of amidyl radicals used in intramolecular hydroaminations to produce isoindolinones. The combination with inline mass spectrometry facilitates a much easier combination of chemical steps in a single flow process. The in-line MS analysis was carried out using Advion Expression® CMS (Atmospheric Pressure Ionisation Techniques (APCI)) and an MRA® valve.
“I would recommend the system to any group that works with continuous flow chemistry, especially those that need real time analysis of stream compositions.”
Quant Express, an addition to Advion’s user-friendly Mass Express 4.0 software suite, features quantitation to create a fully integrated software system for expression CMS users.
N. Holmes, G.R. Akien, R.J.D. Savage, C. Stanetty, I.R. Baxendale, A.J. Blacker, B.A. Taylor, R.L. Woodward, R.E. Meadows, and R.A. Bourne An automated continuous reactor for the synthesis of organic compounds, which uses online mass spectrometry (MS) for reaction monitoring and product quantification, is presented. Quantitative and rapid MS monitoring was developed and calibrated using …
This note covers work carried out at Leeds University with co-workers from Durham University in the area of flow chemical synthesis using the expression CMS (Advion, Ithaca, NY). Two different reactions are described.
With over 20 years of mass spectrometry and chemistry expertise, Advion has produced a family of compact mass spectrometers designed for the chemist. The affordability, small size and ease of use make them ideal for use directly at the chemist’s bench, giving immediate answers and informed decisions instead of waiting. The Advion expression compact mass …
The expression CMS was developed with the chemist’s objectives and laboratory workflow in mind. Organic, Natural Product and Peptide chemists utilize many techniques to determine the progress, yield and purity of their reactions.