Abstract
A highly efficient 12-step synthesis of the marine alkaloid (-)-nakadomarin A has been accomplished. The key advanced intermediate, a tetracyclic ketone derivative, was constructed in just seven steps using a sequence that includes an asymmetric Pauson-Khand reaction, an Overman rearrangement reaction, a ring-closing metathesis reaction, and an amination reaction. Late introduction of the furan ring during the synthesis of (-)-nakadomarin A means that the key tetracyclic ketone derivative has the potential to serve as an advanced intermediate for the synthesis of related marine alkaloids.
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