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. 2021 Dec 1;122(1):565–788. doi: 10.1021/acs.chemrev.1c00449

Scheme 102. Synthesis of π-Extended S-Doped Double [6]Helicenes.

Scheme 102

Reagents and conditions: (a)206 MoCl5 (20 equiv), DCM (5 mM), rt, 40 min; (b) Pd/C, HCO2H, Et3N, pyridine, 130 °C, 25–72 h; (c)207 MoCl5, O2-purged dry DCM, rt, 27 h.