作者:Tadahiko Kajiwara、Yoshihiko Akakabe、Kenji Matsui、Kazuya Kodama、Harunobu Koga、Takamitsu Nagakura
DOI:10.1016/s0031-9422(96)00884-9
日期:1997.6
(-)-(3R,4R)-3-Butyl-4-vinylcyclopentene [(-)-1] was synthesized via (+)-(1S,5R)-3-oxabicyclo [3,3,0] oct-6-en-2-one. Synthetic (-)-1 coincided with the peak with later retention time of racemic (+/-)-1 in a chiral GC (CP-Cyclodex 236M), while the natural 1 in essential oils from the marine brown algae, Dictyopteris prolifera and D. sp. was identical with the earlier retention time peak. Thus, the absolute configuration of the natural product in Dictyopteris oils was determined as (+)-(3S,4S) with ca 100% enantiomeric excess. (C) 1997 Elsevier Science Ltd.
(-)-(3R,4R)-3-丁基-4-乙烯基环戊烯 [(-)-1] 是通过 (+)-(1S,5R)-3-氧杂双环[3,3,0]辛-6-烯-2-酮合成的。合成的 (-)-1 与外消旋 (+/-)-1 混合物在手性气相色谱 (CP-Cyclodex 236M) 中保留时间较晚的峰一致,而来自海洋褐藻 Dictyopteris prolifera 和 D. sp. 的精油中的天然 1 则与保留时间较早的峰相同。因此,Dictyopteris 精油中天然产物的绝对构型被确定为 (+)-(3S,4S),具有约 100% 的对映体过量。© 1997 Elsevier Science Ltd.