Fig. 2
From: Dehydrative π-extension to nanographenes with zig-zag edges
Synthesis of zig-zag NGs. a CHCl3, Br2; b 2:1 toluene/MeOH, 2.5% Pd(PPh3)4, K2CO3, 80 °C, N2 (3: 61%, 4: 65%); c DPEX: CH2Cl2, 2 vol% sat. SnCl2•2H2O/i-PrOH, 1 vol% conc. H2SO4, rt, (quant.); d nitrobenzene, Br2; e 2:1 toluene/MeOH, 4% Pd(PPh3)4, K2CO3, 80 °C, N2 (8: 81 %, 9: 91 %); f CH2Cl2, 1.6 equiv. HMTAB, rt (quant.); g 2:1 toluene/MeOH, 2.5 % Pd(PPh3)4, K2CO3, 80 °C, N2 (3a: 66 % with phenylboronic acid); HMTAB: 1:2 hexamethylentetramine-bromine complex
