Direct Synthesis of Fluorescent 1,3a,6a‐Triazapentalene Derivatives via Click—Cyclization—Aromatization Cascade Reaction.
2012
An efficient and versatile method was established for the preparation of 1,3a,6a-triazapentalenes. The 1,3a,6a-triazapentalene skeleton without an additional fused ring system was discovered to be a compact and highly fluorescent chromophore, which exhibited various interesting fluorescent properties such as a noteworthy correlation of luminescent wavelength with the Hammett σp value and a strongly positive solvatofluorochromism.
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