Abstract
Chiral [Al(salen)Cl] complex (10 mol%) in the presence of 2,6-lutidine (10 mol%) was found to be effective in catalysing the enantioselective Friedel–Crafts-type conjugate addition of indoles ( 3 ) to ( E)-arylcrotyl ketones ( 2 ), furnishing the corresponding β-indolyl ketones in excellent yield and high enantioselectivity (ee up to 89%).
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