Rapid Synthesis of Functionalized Hydrocarbazolones
<i>via</i>
Indole C2−H Activation Using Enone Functionality as a Directing Group/Electrophilic Species
作者:Mai Yanagawa、Shingo Harada、Shumpei Hirose、Tetsuhiro Nemoto
DOI:10.1002/adsc.202100098
日期:2021.4.13
target. A rhodium‐catalyzed C−H functionalization reaction with acceptor/acceptor diazo compounds was developed for synthesizing 2,3‐fused indole variants. An α,β‐unsaturated enone was utilized as a directing group for site‐selective C−H activation and as an electrophile for the subsequent cyclization. Overall, the developed annulation enabled the rapid assembly of synthetically valuable hydrocarbazolones
氢咔唑酮是许多天然生物活性化合物中的关键结构单元,因此是有价值的合成靶标。与受体/受体重氮化合物进行铑催化的CH官能化反应已开发出来,用于合成2,3-稠合的吲哚变体。α,β-不饱和烯酮被用作位点选择性CH活化的导向基团,并用作随后环化的亲电试剂。总体而言,发达的环空技术使人们可以从容易获得的吲哚中快速合成具有合成价值的咔唑酮。此外,进行了计算研究以阐明反应途径并合理化实验观察到的位点选择性。