(+)‐(1<i>S</i>, 3<i>S</i>, 6<i>S</i>, 8<i>S</i>)‐und (−)‐(1<i>R</i>, 3<i>R</i>, 6<i>R</i>, 8<i>R</i>)‐4, 9‐Twistadien: Synthese und Bestimmung der absoluten Konfiguration

Abstract

(+)‐(1 S , 3 S , 6 S , 8 S )‐and (−)‐(1 R , 3 R , 6 R , 8 R )‐4, 9‐Twistadiene: Synthesis and Absolute Configuration A synthesis and the determination of the absolute configuration of (+)‐(1 S , 3 S , 6 S , 8 S )‐ and (−)‐(1 R , 3 R , 6 R , 8 R )‐4, 9‐twistadiene ((+)‐ and (−)‐ 4 , respectively) is described. Their chiroptical properties are compared with those of saturated twistane ((+)‐ and (−)‐ 5 ) as well as with those of the unsaturated and saturated 2, 7‐dioxatwistane analogs (+)‐ and (−)‐ 9 , and (+)‐ and (−)‐ 10 , respectively, which also are compounds of known absolute configurations.