Abstract
A short and efficient process for the preparation of high-quality dicyclopropylamine HCl salt is described. An oxygen-mediated Chan–Lam coupling of N-cyclopropyl 4-nitrobenzenesulfonamide with cyclopropylboronic acid was followed by an optimized p-nosyl deprotection with 1-decanethiol, providing the title compound in high chemical yield. This process addresses many of the challenges and liabilities inherent in previous synthetic approaches to this challenging molecule. The collection of key safety data enabled implementation of an oxygen-mediated process on-scale and ensured safe operation throughout development, optimization, and processing.
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