Construction of hexabenzocoronene-based chiral nanographenes

• Ranran Li,
• Di Wang,
• Shengtao Li and
• Peng An

Beilstein J. Org. Chem. 2023, 19, 736–751, doi:10.3762/bjoc.19.54

• chiral nanographenes. Keywords: chiral nanographene; helicene; racemization barrier; Scholl reaction; single-crystal X-ray diffractometry; Introduction Graphene, an allotrope of carbon, has captured widespread attention since it was first experimentally demonstrated as a monolayer of carbon atoms [1

• synthetic procedure, NG 65 was also synthesized as a chiral axis-based chiral NG by starting with octafluoroanthracen. Recently, An and co-workers reported an atropisomeric chiral nanographene with chirality purely stemming from an axially chiral binaphthyl. As shown in Scheme 7, the Diels–Alder reaction of

• = 1375 M−1 cm−1 at 573 nm at 430 nm) for enantiopure 125 was obtained. In 2019, Wang and co-workers reported the largest atomically precise three-dimensional conjugated chiral nanographene propeller 128, representing the largest three-dimensional conjugated polyaromatics everprepared using scalable