Circular dichroism of guaianolides and the products of their amination
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The presence of an α-oriented hydroxy group at C8 in a guaianolide promotes the stereospecificity of the amination of an exomethylene bond linked with the γ-lactone grouping. The addition of morphiline and of piperidine to the exomethylene bond of the lactone ring of a guaianolide containing an α-oriented hydroxy group at C8 takes place with the preferential formation of the 11S isomer.
KeywordsCircular Dichroism Lactone Piperidine Morpholine Manganese Dioxide
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