Chemistry Reference
In-Depth Information
tetraphenylcyclopentadienone
220°C
95%
48
49
CuCl
2
/AlCl
3
quant.
50
Scheme 14 Synthesis of a graphene-type structure 50 via Ph-migration [
37
,
38
]
Scheme 15 Synthesis of superbenzenoids 53 and 56 [
39
,
40
]
The method was pushed to the extreme with the synthesis of a giant 222 carbon
graphite sheet 63 by the M¨ llen group [
41
]. Two strategies were presented to access
such a nano-graphene structure. The first pathway relied on a combination of
Diels-Alder reactions involving cyclopentadienone derivatives and alkynes 61,
and a cyclotrimerization of alkyne 62. The second strategy relied exclusively on
