Tetrahedron Letters p. 7373 - 7376 (1991)
Update date:2022-07-30
Topics:
Lowenthal, Richard E.
Masamune, Satoru
The Cu(I) complexes of new bis-oxazolines (3-7) prepared from the corresponding amino alcohols and malono-bis-imidate exhibit high enantioselectivity of up to 94 percent ee in the catalytic cyclopropanation of trisubstituted and unsymmetrical cis-1,2-disubstituted olefins.New diazoacetate reagents have also been developed giving high trans/cis ratios of up to 99:1 trans.
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