Abstract
| - The aromatic ketone 2,2‘,4,4‘-tetramethoxybenzophenone hasa strong absorption band between 300 and 375 nm, and itsπ,π* triplet excited-state is selectively populated in methanol.Both facts make this aromatic ketone a versatile and efficienttriplet photocatalyst for the transformation of α-diazo carbonyl compounds into mainly the cyclopropanation product.
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