Flow synthesis of oxadiazoles coupled with sequential in-line extraction and chromatography
作者:Kian Donnelly、Marcus Baumann
DOI:10.3762/bjoc.18.27
日期:——
continuous flow process is reported for the synthesis of various 1,3,4-oxadiazoles via an iodine-mediated oxidative cyclisation approach. This entails the use of a heated packed-bed reactor filled with solid K2CO3 as a base. Using DMSO as solvent, this flow method generates the target heterocycles within short residence times of 10 minutes and in yields up to 93%. Scale-up of this flow process was
据报道,通过碘介导的氧化环化方法合成各种 1,3,4-恶二唑的有效连续流程。这需要使用填充有固体K 2 CO 3作为基底的加热填充床反应器。该流动方法使用 DMSO 作为溶剂,在 10 分钟的短停留时间内生成目标杂环,收率高达 93%。该流程已实现放大(34 mmol/h),并具有集成的淬灭和萃取步骤。最后,利用自动化在线色谱系统实现了用于生成杂环目标的强大流动平台。