Chemistry Letters p. 93 - 96 (1987)
Update date:2022-08-04
Topics:
Okada, Keiji
Samizo, Fumio
Oda, Masaji
Optical yields in the 1,3-dipolar cycloaddition of diazofluorene with chiral acrylate or fumarate derivatives were found to be considerably improved by use of Corey's 8-phenylmenthyl group as a chiral O-alkyl group in these esters.The absolute stereochemistry of resulting cyclopropanes is different from the one expected from the "diazo-exchange" mechanism proposed by Walborsky et al.
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