Wleklinski Michael, Loren Bradley P, Ferreira Christina R, Jaman Zinia, Avramova Larisa, Sobreira Tiago J P, Thompson David H, Cooks R Graham
Department of Chemistry , Purdue University , West Lafayette , IN 47907 , USA . Email:
Chem Sci. 2018 Jan 4;9(6):1647-1653. doi: 10.1039/c7sc04606e. eCollection 2018 Feb 14.
We report the high throughput analysis of reaction mixture arrays using methods and data handling routines that were originally developed for biological tissue imaging. Desorption electrospray ionization (DESI) mass spectrometry (MS) is applied in a continuous on-line process at rates that approach 10 reactions per h at area densities of up to 1 spot per mm (6144 spots per standard microtiter plate) with the sprayer moving at 10 microns per s. Data are analyzed automatically by MS using in-house software to create ion images of selected reagents and products as intensity plots in standard array format. Amine alkylation reactions were used to optimize the system performance on PTFE membrane substrates using methanol as the DESI spray/analysis solvent. Reaction times can be <100 μs when reaction acceleration occurs in microdroplets, enabling the rapid screening of processes like -alkylation and Suzuki coupling reactions as reported herein. Products and by-products were confirmed by on-line MS/MS upon rescanning of the array.
我们报告了使用最初为生物组织成像开发的方法和数据处理程序对反应混合物阵列进行的高通量分析。解吸电喷雾电离（DESI）质谱（MS）以连续在线过程应用，在喷雾器以每秒10微米的速度移动时，以高达每毫米1个点（每个标准微量滴定板6144个点）的面积密度接近每小时10个反应的速率进行。MS使用内部软件自动分析数据，以标准阵列格式创建选定试剂和产物的离子图像作为强度图。使用甲醇作为DESI喷雾/分析溶剂，通过胺烷基化反应优化了聚四氟乙烯膜基质上的系统性能。当在微滴中发生反应加速时，反应时间可小于100微秒，从而能够快速筛选本文报道的如烷基化和铃木偶联反应等过程。在对阵列进行重新扫描时，通过在线MS/MS确认产物和副产物。
