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12. Representative experimental procedure: Indium (517 mg,
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resulting mixture was stirred at room temperature for 1 h.
To this solution was added dropwise a solution of ben-
zoyl cyanide (393 mg, 3.0 mmol) in THF (1 mL) at room
temperature. Stirring was continued for 6 h under sonica-
tion and the progress of the reaction was monitored by
TLC. The reaction mixture was filtered through celite and
extracted with ether. The combined organic layer was
washed with brine and dried over anhydrous Na2SO4.
The solvent was removed and the residue was purified by
column chromatography on silica gel (hexane:ethyl ace-
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