Abstract
Reductive coupling of aromatic and heteroaromatic aldehydes and ketones bearing different functional groups to pinacols is effectively catalysed with 1-5 mol% of Cr(II) salts or chromocene in THF/DMF mixtures in the presence of manganese powder and trialkyl chlorosilanes. Excellent dl selectivity can be achieved albeit with lower yield using trialkylsilyl chlorides with bulky substituents.
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