Tetrahedron p. 9599 - 9610 (1997)
Update date:2022-07-30
Topics:
Ichiyanagi, Tsuyoshi
Shimizu, Makoto
Fujisawa, Tamotsu
Chiral 2-(2-aryl- or 2-alkyl-sufonylamino)phenyl-4-phenyl-1,3-oxazolines were found to be effective ligands for copper-catalyzed enantioselective cyclopropanation reaction of olefins. The reaction of styrene with d-menthyl diazoacetate in the presence of optically active copper catalysts gave cyclopropanation products in a ratio of trans: cis = 83: 17 with 63% ee (trans) and 84% ee (cis).
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