132903-58-3Relevant articles and documents
ENANTIOSELECTIVELY CATALYZED INTRAMOLECULAR CYCLOPROPANATIONS OF UNSATURATED DIAZO CARBONYL COMPOUNDS
Dauben, William G.,Hendricks, Robert T.,Luzzio, Michael J.,Ng, Howard P.
, p. 6969 - 6972 (1990)
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.