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A continuous‐flow procedure for the synthesis of β‐ketoesters has been developed through Roskamp reaction between aldehydes and diazoesters in the presence of a Sn‐MCM‐41 catalyst. The viability of this methodology was confirmed with a range of aromatic and aliphatic aldehydes with diazoesters and provided good to excellent yields. Catalyst activity was tested over three days (84 hours) of operation,...
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