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Etude de la cycloaddition du dimethylcetene aux allenes—II:Stereochimie

Authors
Journal
Tetrahedron
0040-4020
Publisher
Elsevier
Publication Date
Volume
31
Issue
7
Identifiers
DOI: 10.1016/0040-4020(75)80091-3

Abstract

Abstract The thermal cycloaddition of dimethylketen to various partially resolved chiral allenes leads to optically active alkylidenecyclobutanones. Accordingly, the reaction is at least stereoselective. Using a 1,3 disubstituted allene of R configuration, one obtains an adduct of R configuration at the newly formed asymetric carbon, whether the adduct is obtained as a pure E isomer or an E and Z mixture.

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