Purchase of a 700MHz NMR Spectrometer for Liquid Applications

描述（由申请人提供）：购买700MHz核磁共振光谱仪用于液体应用项目摘要解决方案核磁共振（NMR）光谱是合成化学家用于阐明分子结构的最强大的光谱工具之一。计算能力、高磁场技术和改进的电子技术的进步极大地提高了灵敏度和化学位移色散，使得检测低自然丰度的原子核现在是常规的。目前，在密歇根大学（UM, Ann Arbor）化学系，老化/过时的核磁共振光谱仪所提供的现有能力与美国国立卫生研究院资助的研究人员的需求之间的差距正在迅速扩大。这种需求源于这样一个事实，即所研究的分子系统不仅在规模和复杂性上都在增长，而且核磁共振正在解决的问题也更加雄心勃勃，包括分子构型、构象、动力学、相互作用和机制的原子表征。专用于液体应用的高场多通道核磁共振波谱仪的可用性将对具有多个立体中心的复杂天然产物的研究，具有多达4个立体中心的环戊烷、四氢呋喃和吡啶等5元碳环体系的相对立体化学测定，不稳定有机硼和有机硅中间体的表征产生重大影响。以及在低浓度下形成的反应性有机金属中间体的时间分辨动力学研究。高分辨率的结构信息将在设计小分子异恶唑烷转录激活剂以及探索酶如何利用自由基催化化学上困难的转化方面具有很高的价值。由于缺乏可获得的现代高场核磁共振波谱仪，这些研究项目的进展和化学专业学生在尖端核磁共振技术方面的培训受到阻碍。因此，为了缩小这一差距，我们建议购买一台多通道700 MHz核磁共振光谱仪，配备最新的低温冷却三重共振探针技术。此外，这种最先进的仪器将提供给附近机构的美国国立卫生研究院资助的化学项目，如托莱多大学，在复杂碳水化合物合成领域将实现重大利益。公共卫生相关性本文所述的美国国立卫生研究院资助的项目将有助于更好地了解影响人类健康的领域。所要求的仪器所带来的进步包括发现潜在的药物先导，了解与疾病进展或预防有关的生物过程，以及制定新的合成战略，为这类研究项目提供创造性的解决方案。

DESCRIPTION (provided by applicant): Purchase of a 700MHz NMR Spectrometer for Liquid Applications Project Summary Solution nuclear magnetic resonance (NMR) spectroscopy is one of the most powerful spectroscopic tools available to the synthetic chemist for the elucidation of the structure of a molecule. Advances in computing power, high-field magnet technology, and improved electronics have dramatically increased both sensitivity and chemical shift dispersion such that detection of low natural abundance nuclei is now routine. Presently in the Chemistry department at the University of Michigan (UM, Ann Arbor) there is a rapidly growing gap between the existing capabilities offered by our aging/obsolete NMR spectrometers and the demands of our NIH-funded investigators. This demand stems from the fact that not only have the molecular systems under investigation grown in size and complexity, the questions being addressed by NMR are also more ambitious and include atomic characterization of molecular configuration, conformation, dynamics, interactions and mechanisms. The availability of a high field, multi-channel NMR spectrometer dedicated to liquid applications will have a significant impact on the investigation of complex natural products bearing multiple stereocenters, determination of relative stereochemistry of 5-membered carbocyclic ring systems such as cyclopentanes, tetrahydrofurans, and pyrrolidines possessing up to 4 stereocenters, characterization of unstable organoboron and organosilicon intermediates, and time-resolved kinetic studies of reactive organometallic intermediates formed in low concentrations. High-resolution structural information will be highly valuable in designing small molecule isoxazolidine transcriptional activators, as well as probing how enzymes use free radicals to catalyze chemically difficult transformations. Progress in these research projects and the training of chemistry students in cutting-edge NMR techniques are hampered due to the lack of an accessible modern high field NMR spectrometer. Therefore, to close this gap, we propose the purchase of a multi-channel 700 MHz NMR spectrometer outfitted with the latest in cryogenically cooled, triple resonance probe technology. Additionally, access to such a state-of-the-art instrument will be made available to NIH-funded chemistry projects at nearby institutions such as the University of Toledo, where significant benefit would be realized in the area of complex carbohydrate synthesis. PUBLIC HEALTH RELEVANCE The NIH-funded projects described herein will contribute to a greater understanding of areas that impact human health. Advances enabled by the requested instrumentation include the discovery of potential drug leads, the understanding of biological processes involved in disease progression or prevention, and the development of new strategies in synthesis that enable creative solutions to research projects of this type.