Scheme 223. Transition-Metal-Free, One-Pot Thienannulation of Corannulene.
Reagents and conditions: (a)284 (1) Tf2O, 1,2-DCE, −30 °C, 20 min, then rt, 1 h, (2) microwave, 90 °C, 12 h, (3) Et3N, rt, 20 min, then 50 °C, 5 h.
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