Stannane, tributyl-1-cyclohexen-1-yl- → 5-(cyclohex-1-en-1-yl)-3-[2-(N,N-dimethylamino)ethyl]-1-benzoylindole

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A solution of 5-bromo-3-[2-(N,N-dimethylamino)ethyl]-1-benzoylindole (Example 5a, 109.8 mg 0.30 mmol), 1-tributylstannylcyclohex-1-ene (111 mg, 0.30 mmol) and tetrakistriphenyphosphine palladium (80 mg, 0.07 mmol) in toluene (2 mL) was stirred at 100-110° C. overnight. After removal of the solvent in vacuo, flash chromatography on silica gel (2-10% 2M methanolic ammonia in dichloromethane) yielded 5-(cyclohex-1-en-1-yl)-3-[2-(N,N-dimethylamino)ethyl]-1-benzoylindole (31 mg, 28%).

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