The front cover image, provi
de
d by Svetlana Tšupova, illustrates the gol
d-catalyze
d conversion of allyl- or benzyl-substitute
d diyne systems to fluorene
derivatives. In a
dual gol
d-catalyze
d process, symbolize
d on the cover as the work of the Sun-go
d, gol
d vinyli
denes are forme
d an
d selectively un
dergo formal insertion into a C(
sp2)&n
dash;H bon
d of the unsaturate
d si
de chain. In some cases, isomerization takes place lea
ding to the aromatic system of the final fluorene pro
ducts. Details can be foun
d in the communication on pages 225&n
dash;
233 (J. Bucher, T. Wurm, S. Taschinski, E. Sachs, D. Ascough, M. Ru
dolph, F. Rominger, A. S. K. Hashmi,
Adv. Synth. Catal.
2017,
359, 225&n
dash;
233; DOI:
doi.org/10.1002/adsc.201600987" rel="references:https://doi.org/10.1002/adsc.201600987">10.1002/adsc.201600987).