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Palladium-Catalyzed Remote Hydrosulfonamidation of Alkenes: Access to Primary N -Alkyl Sulfamides by the SuFEx Reaction.
Journal of the American Chemical Society 2024 May 2
Herein, we establish a remote hydrosulfonamidation (HSA) of alkenes using palladium catalysis, where N -fluoro- N -(fluoro-sulfonyl)-carbamate with a sulfur(VI) fluoride moiety is demonstrated as a good amidation reagent. The anti -Markovnikov HSA reaction of terminal alkenes and the remote HSA of internal alkenes are achieved to efficiently yield primary N -alkyl- N -(fluorosulfonyl)-carbamates. In addition, this protocol enables the high-value utilization of alkane by combining the dehydrogenation process. The generated N -alkyl products exhibit a unique reactivity of sulfur(VI) fluorides, which can be directly transferred to N -alkyl sulfamides or amines via the sulfur(VI) fluoride exchange reaction, thereby streamlining their synthesis. Moreover, a (pyridyl) benzazole-type ligand proved to be vital for the excellent chemo- and regioselectivities.
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