Product: Cyclopentyl-4-trifluoromethylbenzene. Mechanism: Ni(0) oxidative addition into Ar–Br → transmetalation with alkyl-BF₃K (base-assisted) → Ir(III)* excited state reduces Ni(II) to Ni(0) via SET, closing cycle.
Here’s a detailed feature set for — designed either as a digital problem set, an interactive online platform, or a supplementary resource for graduate-level courses. advanced organic chemistry practice problems 2021
Suddenly, the pathway cleared. The electrons flowed. The stereochemistry resolved itself. Product: Cyclopentyl-4-trifluoromethylbenzene
Draw the transition state for the thermal closure. Why is the disrotatory mode favored despite steric clash of methyl groups? Suddenly, the pathway cleared
Cyclopentadiene, Methyl vinyl ketone (MVK), Acetylene, and any monofunctional $\textC_1$ to $\textC_3$ reagents.
Cycle: Pd(II) ligation → C–H cleavage via concerted metalation-deprotonation (CMD) → oxidation with NFSI to Pd(IV) → reductive elimination to C–F bond. Ligand L1 creates a chiral pocket, blocking approach to less hindered C–Hs.
A linear enynone (R–C≡C–C(O)–CH=CH₂)