Journal
ORGANIC PROCESS RESEARCH & DEVELOPMENT
Volume 16, Issue 5, Pages 934-938Publisher
AMER CHEMICAL SOC
DOI: 10.1021/op2003437
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The Vilsmeier-Haack formylation of aromatic compounds is a well-established process in organic synthesis, largely driven by the fact that the resulting aldehydes are generally useful intermediates for the synthesis of fine chemicals and pharmaceutical products. Industrial-scale production, however, is often hampered by laborious procedures requiring the use of hazardous chemicals to produce the highly reactive intermediates. In order to circumvent these issues, a flow chemistry approach was developed. This article describes the design and semiautomated optimization of the Vilsmeier-Haack formylation in continuous flow and subsequent scale-up to preparative volumes in an intrinsically safe manner.
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