Table 3.

Substrate scope of monobenzocyclooctadiene synthesis, varying the substituents at the terminal allylic position of the substrate.^[a,b]

[a] Reaction conditions: For 18, 19, 21–24: (0.1 mmol, 1.0 equiv), LiO^tBu (0.12 mmol, 1.2 equiv), p‐TsNHNH₂ (0.1 mmol, 1.0 equiv), [Co(TPP)] (5 mol %), benzene (1 mL), 60 °C, overnight. For 20: (0.1 mmol, 1.0 equiv), LiO^tBu (0.12 mmol, 1.2 equiv), p‐TsNHNH₂ (0.1 mmol, 1.0 equiv), [Co(TPP)] (10 mol %), benzene (1 mL), room temperature, 48 h. [b] Isolated yield, corrected for the E/Z ratios of the substrates.