Initial Route Scouting and Final Process Development for the Multi-Kg Production of 3-Fluoro-6-methoxyquinoline from p-Anisidine and 2-Fluoromalonic Acid
Abstract:A scalable route to 3-fluoro-6-methoxyquinoline
needed to be developed
as multi-kg amounts of this heterocycle were required. Initial route
development focused on the formation of the key C–F bond via
a Balz–Schiemann reaction or electrophilic fluorination using
Selectfluor. Both routes were developed on laboratory scale and provided
gram amounts of 3-fluoro-6-methoxyquinoline. However, due to process
safety concerns and high step counts, both routes were not suitable
for further scale up. Therefore, a third a… Show more
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