Tetrahedron Letters p. 6969 - 6972 (1990)
Update date:2022-08-02
Topics:
Dauben, William G.
Hendricks, Robert T.
Luzzio, Michael J.
Ng, Howard P.
A series of unsaturated α-diazo carbonyl compounds underwent enantioselective intramolecular cyclopropanation (ee = 4-77percent) when treated with an enantiomerically pure chiral copper catalyst.The nature of the diazo substrate was critical: α-diazo ketones gave the best enantioselectivities whereas α-diazo β-keto ester systems showed diminished enantioselectivities.
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