Methyl indole-7-carboxylate → 3-(2,2,3,3-Tetramethyl-cyclopropanecarbonyl)-1H-indole-7-carboxylic Acid Methyl Ester

Participants

Reaction Steps

A mixture of methyl-indole-7-carboxylate (Maybridge, 1.0 g, 5.7 mmol), ethylmagnesium bromide (1.0 M solution in THF, 6.9 mL, 6.9 mmol), zinc chloride (1.0 M solution in Et2O, 6.9 mL, 6.9 mmol) and the product of Example 1A (7.4 mmol) in 25 mL of dichloromethane was processed as described in Example 1B to provide the title compound (1.1 g, 3.6 mmol, 63% yield). MS (DCI/NH3) m/z 300 (M+H)+.

Provenance & Evidence