Table 4 Optimization of reaction conditions for the construction of indoles.

Reaction conditions: 3a (0.1 mmol, 1 equiv.), catalyst [x mole percent (mol %)], ligand (0.01 mmol, 0.1 equiv.), AgSbF6 (0.01 mmol, 0.1 equiv.), 4 Å MS (30 mg), and base (0.2 mmol, 2.0 equiv.) in solvent (1.0 ml) for 48 hours at 110°C. DME, dimethoxyethane; NMP, N-methyl-2-pyrrolidone.


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