Abstract
A new effective strategy for the synthesis of sp3‐rich small molecules for library production is presented. The key steps to generate complexity involve a Petasis three‐component reaction followed by an intramolecular Diels–Alder and cyclization to generate a densely enriched tricyclic or tetracyclic scaffolds with 3–4 stereocenters and three handles for decoration. The strategy was used for the production of 143 molecules for the European Lead Factory.
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