作者:Arindam Khatua、Sovan Niyogi、Vishnumaya Bisai
DOI:10.1039/c9ob01373c
日期:——
catalytic asymmetric total synthesis of a sesquiterpene, (+)-ar-macrocarpene (1), in 7 steps with 42.1% overall yields from commercially available inexpensive 5,5-dimethylcyclohexane 1,3-dione. This strategy relies on a key [3,3]-sigmatropic rearrangement effecting reductive transposition through allylic diazene rearrangement (ADR) in a single step from intermediate allylic alcohol (+)-12 under the Mitsunobu
这份报告的特点是分七步进行了倍半萜烯(+)-ar-大丁烯(1)的首次催化不对称全合成,从可商购的廉价5,5-二甲基环己烷1,3-二酮中获得42.1%的总收率。此策略依赖于关键的[3,3]-σ重排,在Mitsunobu反应条件下,与邻硝基苯磺酰肼(o- NBSH)。在Corey-Bakshi-Shibata还原条件下对α-溴乙烯基酯16的对映选择性还原以高度对映体富集的方式(95%ee)在烯丙基醇(+)-12中锻造所需的立体中心。