Solution-Phase Synthesis of Mixed Amide Libraries by Simultaneous Addition of Functionalities (SPSAF) to a Diketopiperazine Tetracarboxylic Acid Scaffold Monitored by GC Analysis of Isobutyl Alcohol
作者:Massimo Falorni、Giampaolo Giacomelli、Andrea Porcheddu、Maurizio Taddei
DOI:10.1002/(sici)1099-0690(200004)2000:8<1669::aid-ejoc1669>3.0.co;2-r
日期:2000.4
amines. We have also developed a simple method for monitoring the required conversion of the acid into amides based on an assay of the amount of iBuOH (determined by GC) formed during the coupling mediated by isobutyl chloroformate. We have observed that a conversion higher than 90% (iBuOH by GC) guarantees correct formation of the desired amides. This indirect method for assessing the conversion in a combinatorial
对称二酮哌嗪支架 2 已通过非常简单的两步程序从 L-天冬氨酸二甲酯制备。该产品(一种在两个对称位置受到同等保护的四羧酸)已被用作使用 SPSAF(同时添加官能团)策略在溶液相中合成混合酰胺库的模板。通过明智地选择所用的胺,可以仅使用少量不同的胺来制备包含数百种产品的平行库。我们还开发了一种简单的方法,用于监测在氯甲酸异丁酯介导的偶联过程中形成的 iBuOH(通过 GC 确定)的量的测定,用于监测所需的酸转化为酰胺。我们观察到高于 90% 的转化率(iBuOH 通过 GC)保证了所需酰胺的正确形成。这种在使用混合反应物 (SPSAF) 的组合反应中评估转化率的间接方法可方便地用于常规测定在溶液相中制备的库。从更广泛的角度来看,目前的结果有助于开发新的简单系统以监测组合反应的进展和演变