Phosphine-Free Palladium-Catalyzed Direct C-3 Arylation of 2-Phenylimidazo[1,2-a]pyridine Using Silver(I) Carboxylate

Figure 2

Molecular structure of the compound 3c (entry 3). (X-ray data was collected on a Bruker AXS-SMART diffractometer using Mo-K_𝛼(𝜆 = 0.71073 Å) radiation. The structure was solved and refined by standard methods. Crystal data for 3c: C₂₀H₁₆N₂, M = 284.35, Monoclinic, Space group P2(1)/n, a = 7.4312(15), b = 11.708(2), c = 17.611(4) Å, α = 90.00°, 𝛽=95.36(3)°, γ = 90.00°, V = 1525.6(5) ų, Z = 4, μ = 0.073 mm⁻¹, data/restraints/parameters: 2677/0/200, R indices (I > 2(I)): R1 = 0.0513, wR2 (all data) = 0.1208. CCDC no. 885064).