Automated parallel synthesis of small organic molecules, either as single entities or as mixtures, offers the potential for the rapid optimization of physical and biological properties of a molecule. Currently, emphasis has been placed on solid phase synthesis technology to accomplish the rapid preparation of large numbers of molecules. Automated solution phase synthesis is an alternative approach which has the advantages of having shorter development times and being more amenable to scaleup. Utilizing commercially available liquid handlers for reaction setup and exploiting automated solid phase extraction for product purification, a procedure has been developed to prepare and purify up to 100 amide analogs, simultaneously. Both carbodiimide mediated couplings and p-nitrophenyl ester displacements have been carried out using this procedure. Product amides having overall neutral or basic character have been prepared in good yield and with good to excellent purities.
小有机分子的自动化并行合成,无论是作为单一实体还是混合物,都为快速优化分子的物理和
生物学特性提供了可能。目前,重点放在固相合成技术上,以实现大量分子的快速制备。自动化溶液相合成是一种替代方法,具有开发周期短和更易于规模化的优势。利用商用的液体处理系统进行反应设置,并利用自动化固相萃取进行产品纯化,开发了一种流程,能够同时制备和纯化多达100个酰胺类似物。该流程已用于羰基二
咪唑介导的偶联反应和
硝基苯酯位移反应。制备出的酰胺产品具有中性或碱性特性,产率高,纯度良好至优秀。