Tetrazo[1,2‐B]indazoles: Straightforward Access to Nitrogen‐Rich Polyaromatics from s‐Tetrazines
Abstract
The straightforward access to a new class of aza-polyaromatics is reported. Starting from readily available fluorinated s-tetrazine, a cyclization process with azide leads to the formation of an unprecedented tetrazo[1,2-b]indazole or a bis-tetrazo[1,2-b]indazole (cis and trans conformers). Based on the new nitrogen core, further N-directed palladium-catalyzed ortho-C−H bond functionalization allows the introduction of halides or acetates. The physicochemical properties of these compounds were studied by a joint experimental/theoretical approach. The tetrazo[1,2-b]indazoles display solid-state π-stacking, low reduction potential, absorption in the visible range up to the near-infrared, and intense fluorescence, depending on the molecular structure.
Domains
Organic chemistry
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Angew Chem Int Ed - 2023 - Daher - Tetrazo 1 2‐b indazoles Straightforward Access to Nitrogen‐Rich Polyaromatics from.pdf (3.57 Mo)
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Origin : Publication funded by an institution
Licence : CC BY NC - Attribution - NonCommercial
Licence : CC BY NC - Attribution - NonCommercial