Benzo-Fused Periacenes or Double Helicenes? Different Cyclodehydrogenation Pathways on Surface and in Solution
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DOI: 10.1021/jacs.9b01267
Abstract: Controlling the regioselectivity of C–H activation in unimolecular reactions is of great significance for the rational synthesis of functional graphene nanostructures, which are called nanographenes. Here, we demonstrate that the adsorption of tetranaphthyl-p-terphenyl precursors on… read more here.
Keywords: benzo fused; solution; double helicenes; synthesis ... See more keywords
Thiophene/selenophene-based S-shaped double helicenes: regioselective synthesis and structures
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DOI: 10.3762/bjoc.18.81
Abstract: 2,5-Di(trimethylsilanyl)dithieno[2,3-b:3′,2′-d]thiophene ((TMS)2-bb-DTT), 2,5-di(trimethylsilanyl)diseleno[2,3-b:3′,2′-d]thiophene ((TMS)2-bb-DST), and 2,5-di(trimethylsilanyl)diseleno[2,3-b:3′,2′-d] selenophene ((TMS)2-bb-DSS) were used as starting materials to synthesize three S-shaped double helicenes (i.e., DH-1, DH-2, and DH-3) through monobromination, formylation, the Wittig reaction, and double oxidative photocyclization. The… read more here.
Keywords: selenophene based; double helicenes; thiophene selenophene; shaped double ... See more keywords