作者:Ashleigh B. Theberge、Estelle Mayot、Abdeslam El Harrak、Felix Kleinschmidt、Wilhelm T. S. Huck、Andrew D. Griffiths
DOI:10.1039/c2lc21019c
日期:——
This paper presents a droplet-based microfluidic platform for miniaturized combinatorial synthesis. As a proof of concept, a library of small molecules for early stage drug screening was produced. We present an efficient strategy for producing a 7 × 3 library of potential thrombin inhibitors that can be utilized for other combinatorial synthesis applications. Picolitre droplets containing the first type of reagent (reagents A1, A2, …, Am) were formed individually in identical microfluidic chips and then stored off chip with the aid of stabilizing surfactants. These droplets were then mixed to form a library of droplets containing reagents A1–m, each individually compartmentalized, which was reinjected into a second microfluidic chip and combinatorially fused with picolitre droplets containing the second reagent (reagents B1, B2, …, Bn) that were formed on chip. The concept was demonstrated with a three-component Ugi-type reaction involving an amine (reagents A1–3), an aldehyde (reagents B1–7), and an isocyanide (held constant), to synthesize a library of small molecules with potential thrombin inhibitory activity. Our technique produced 106 droplets of each reaction at a rate of 2.3 kHz. Each droplet had a reaction volume of 3.1 pL, at least six orders of magnitude lower than conventional techniques. The droplets can then be divided into aliquots for different downstream screening applications. In addition to medicinal chemistry applications, this combinatorial droplet-based approach holds great potential for other applications that involve sampling large areas of chemical parameter space with minimal reagent consumption; such an approach could be beneficial when optimizing reaction conditions or performing combinatorial reactions aimed at producing novel materials.
本文介绍了一种基于液滴的微型组合合成微流控平台。作为概念验证,我们制作了一个用于早期药物筛选的小分子化合物库。我们提出了一种高效的策略,用于生产 7 × 3 的潜在凝血酶抑制剂文库,该文库可用于其他组合合成应用。含有第一类试剂(试剂 A1、A2、......、Am)的微液滴在相同的微流控芯片中单独形成,然后借助稳定表面活性剂在芯片外储存。然后将这些液滴混合,形成一个含有试剂 A1-m 的液滴库,每个液滴都单独分隔,再注入第二个微流体芯片,与芯片上形成的含有第二种试剂的皮升液滴(试剂 B1、B2、......、Bn)组合融合。我们用一个涉及胺(试剂 A1-3)、醛(试剂 B1-7)和异氰化物(保持不变)的三组份 Ugi- 型反应演示了这一概念,以合成一个具有潜在凝血酶抑制活性的小分子库。我们的技术以 2.3 kHz 的速率产生 106 个液滴。每个液滴的反应体积为 3.1 pL,比传统技术至少低六个数量级。液滴可以分成等分液滴,用于不同的下游筛选应用。除了药物化学应用外,这种基于液滴的组合方法在其他应用中也具有巨大潜力,这些应用涉及以最少的试剂消耗对化学参数空间的大面积区域进行采样;这种方法在优化反应条件或进行旨在生产新型材料的组合反应时可能非常有益。