作者:Arindam Khatua、Kundan Shaw、Vishnumaya Bisai
DOI:10.1016/j.tetlet.2020.151736
日期:2020.4
Concise catalytic asymmetric total syntheses of both the enantiomers of aromatic sesquiterpenes, (+)-ar-macrocarpene (1) and (–)-ar-macrocarpene (ent-1) is featured in 4 steps, 66.0% overall yields from commercially available 5,5-dimethylcyclohexane 1,3-dione 13. The enantioenriched 5,5-dimethyl-3-(p-tolyl)cyclohexanone 10 is found to be the key intermediate, which was obtained from catalytic enantioselective
芳香倍半萜的对映体(+)- ar-大分子烯(1)和(-)- ar-大分子烯(ent - 1)的对映异构体的简明催化不对称全合成具有4个步骤,市售总收率66.0%5 ,5-二甲基环己烷1,3-二酮13。发现对映体富集的5,5-二甲基-3-(对甲苯基)环己酮10是关键中间体,它是通过使用Pd(II)-(S,S)将对映选择性对甲苯二硼酸催化加成到烯酮11上而获得的-DUPHOS(ent - L5)处于99%ee以上。最后,用Wolf-Kishner还原环己酮10可以直接访问天然的倍半萜类化合物(+)- ar-大果烯(1)。