A New Approach to Sesquiterpene Arenes of the 9,11-Drimenyl Type (= [(1E,2RS,4aRS,8aRS)-Octahydro-2,5,5,8a-tetramethylnaphthalen-1(2H)-ylidene] methyl Type)
作者:Andreas Bernet、Karlheinz Seifert
DOI:10.1002/hlca.200690071
日期:2006.4
A new reaction sequence for the synthesis of the sesquiterpene arenes (±)-wiedendiol B ((±)-1) and the siphonodictyal B derivative (±)- 21 consists in the coupling of (±)-drimanoyl chloride ((±)-3) with lithiated and appropriately substituted aromatic synthons to furnish the ketones (±)-7 and (±)-17 which were reduced to the benzyl alcohols (±)-8a,b and (±)-18a,b, respectively (Schemes 5, 4, and 12)
倍半萜烯芳烃(±)-wi烯二醇B((±)-1)和虹吸乙醛B衍生物(±)-21的合成新反应顺序在于(±)-十二烷酰氯((±)- 3)用锂化并适当取代的芳族合成子提供酮(±)-7和(±)-17,它们分别还原为苄醇(±)-8a,b和(±)-18a,b(流程5、4和12)。通过除去苄醇(±)-中的H 2 O,形成了drimenes(±)-9和(±)-19的9,11-双键。图8a,b和(±)-18a,b(方案6和12)。新的替代方法已应用于该消除反应,其中涉及吡啶·SO 3络合物或乙二醛作为试剂。