Multistep Continuous-Flow Processes for the Preparation of Heterocyclic Active Pharmaceutical Ingredients

Flow chemistry has many fascinating facets, among which the most challenging is arguably the implementation of complex multistep processes within one uninterrupted fluidic network. This document provides a thorough overview of some of the most representative examples of multistep continuous-flow strategies in the specific context of preparing heterocyclic active pharmaceuticals. Selected examples emphasizing the implementation of multistep sequences, including various combinations of chemical transformations, purifications, or in-line analysis, are discussed.