Visible Light Mediated N-Desulfonylation of N-Heterocycles using a Heteroleptic Copper (I) Complex as a Photocatalyst
- Cameron J. Hunter
- Michael J. Boyd
- Gregory D. May
- Robert Fimognari*
- Vertex Pharmaceuticals Incorporated, 50 Northern Avenue, Boston, Massachusetts 02210, United StatesRead the publication that featured this abstract
A photoredox protocol that uses a heteroleptic Cu (I) complex [Cu(dq)(BINAP)]BF4 has been developed for the photodeprotection of benzenesulfonyl protected N-heterocycles. A range of substrates were examined, including indazoles, indoles, pyrazoles, and benzimidazole, featuring both electron-rich and electron-deficient substituents, giving good yields of the N-heterocycle products with broad functional group tolerance. This transformation was also found to be amenable to flow reaction conditions.
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