Synthesen und absolute Konfigurationen von (+)-(6R,2′S)-Cryptocaryalacton und (-)-(6S,2′S)-Epicryptocaryalacton

A short stereoselective synthesis of (+)-(6R,2'S)-cryptocaryalactone via ring-closing metathesis

A short stereoselective synthesis of (+)-(6R,2'S)-cryptocaryalactone was successfully completed. Key steps included the application of Carreira's asymmetric alkynylation reaction to form a propargylic alcohol and subsequently lactone formation using the powerful ring-closing metathesis reaction.

Absolute configurations of all four stereoisomers of cryptocaryalactone and deacetyl cryptocaryalactone

Using information available in the literature and correlating this with physical data obtained for cryptocaryalactone stereoisomers isolated from C. myrtifolia and C. wyliei, it has been possible to assign the absolute configurations of the four stereoisomers of the title compound and its deacetyl analogue.