An efficient dehydrogenativeDiels–Alder (DHDA) reaction of prenylderivatives with 2,3‐dichloro‐5,6‐dicyanobenzoquinone (DDQ) has been developed under mild conditions, leading to a series of cyclohexene derivatives with good to excellent yields and excellent diastereoselectivity.
The ene reaction of singletoxygen with prenylated dihydroxyacetophenones led to the 2-hydroperoxy-3-methylbut-3-enyl derivatives as the major product. This original regioselectivity outlined a new effect, in competition with the previously established large group non-bonding effect. The oxidation products distribution could be explained by a stabilising interaction between the phenolic hydrogen, ortho
Intramolecular hydroarylation of alkenes through hydrogen atomtransfer (HAT) represents a robust method to prepare benzo-fused heterocycles. However, the reported methods have limitations in a variety of accessible cyclic scaffolds. Here we report a dual cobalt- and photoredox-catalyzed HAT hydroarylation of alkenes that is characterized by higher efficiency in the synthesis of a δ-lactam compared
通过氢原子转移 (HAT) 对烯烃进行分子内加氢芳基化是一种制备苯并稠合杂环的可靠方法。然而,所报道的方法在各种可接近的环状支架中存在局限性。在这里,我们报告了双钴和光氧化还原催化的烯烃 HAT 氢化反应,其特点是与已建立的方案相比,合成 δ-内酰胺的效率更高。所提出的机制得到了实验和 DFT 计算的支持。
Development, Synthesis, and in silico Investigations of Novel Acyclic Allyl Fluoride Derivatives
作者:Vaneet Saini、Nishita Chauhan、Harjinder Singh、Kamal Nain Singh、Jeffrey M. McKenna
DOI:10.1055/a-1961-8013
日期:2023.3
A onestep electrophilic fluorination of alkenes is reported, which furnishes the products in a highly regioselective manner via allylic rearrangement. The reaction proceeds efficiently under mild conditions with the use of trisubstituted alkenes as olefin partner and Selectfluor as an electrophilic fluorinating agent without the need of any transition metal catalyst or pre-functionalized substrates
We have developed a widely applicable (radio)fluoro-iodination of alkenes using readily available and easily handled KF (18F). The reactions exhibited high functional group tolerance and needed only an ambient atmosphere. Furthermore, the resulting product could be further functionalized with various nucleophiles.