Electrocatalytic Activation of Donor–Acceptor Cyclopropanes and Cyclobutanes: An Alternative C(sp
<sup>3</sup>
)−C(sp
<sup>3</sup>
) Cleavage Mode
作者:Simon Kolb、Martin Petzold、Felix Brandt、Peter G. Jones、Christoph R. Jacob、Daniel B. Werz
DOI:10.1002/anie.202101477
日期:2021.7.12
We describe the first electrochemical activation of D–A cyclopropanes and D–A cyclobutanes leading after C(sp3)−C(sp3) cleavage to the formation of highly reactive radical cations. This concept is utilized to formally insert molecular oxygen after direct or DDQ-assisted anodic oxidation of the strained carbocycles, delivering β- and γ-hydroxy ketones and 1,2-dioxanes electrocatalytically. Furthermore
Lewis Acid Catalyzed Nucleophilic Ring Opening and 1,3-Bisfunctionalization of Donor–Acceptor Cyclopropanes with Hydroperoxides: Access to Highly Functionalized Peroxy/(α-Heteroatom Substituted)Peroxy Compounds
作者:Kuldeep Singh、Tishyasoumya Bera、Vandana Jaiswal、Subrata Biswas、Biplab Mondal、Dinabandhu Das、Jaideep Saha
DOI:10.1021/acs.joc.8b02561
日期:2019.1.18
catalyzed ring opening reaction of Donor–Acceptor (D–A) cyclopropanes with alkyl hydroperoxides is reported to furnish various peroxycarbonyls and 1,3-haloperoxygenated compounds in good to excellent yields. This method adds another instance to scarcely reported noncyclilizing 1,3-bisfunctionalization of D–A cyclopropanes with two different functional groups and relies on the dual role of peroxide as nucleophile
A highly regioselective tandem 1,3-dipolar cycloaddition of cyclopropene 1,1-diesters and nitrile oxides: synthesis of highly functionalized isoxazoles
作者:Shaojin Chen、Jun Ren、Zhongwen Wang
DOI:10.1016/j.tet.2009.09.034
日期:2009.11
A highly regioselective tandem 1,3-dipolar cycloaddition of cyclopropene 1,1-diesters with nitrile oxides was described. This reaction supplied a new method for synthesis of polyfunctionalized isoxazole derivatives in moderate to excellent yields under mild conditions.