Previous transition metal-catalyzed synthesis processes of δ-diketones are plagued by the high cost of the rhodium catalyst and harsh reaction conditions. Herein a low-cost, roomtemperature ruthenium catalytic method is developed based on the coupling of α-keto sulfoxoniumylides with cyclopropanols. The mild protocol features a broad substrate scope (47 examples) and a high product yield (up to 99%)
Iron-Catalyzed Ring Opening of Cyclopropanols and Their 1,6-Conjugate Addition to <i>p</i>-Quinone Methides
作者:Baliram B. Mane、Suresh B. Waghmode
DOI:10.1021/acs.joc.1c02059
日期:2021.12.17
A novel iron-catalyzed ringopening of cyclopropanols and their 1,6-conjugate addition to p-quinone methides for accessing substituted phenols is disclosed. In this protocol, various cyclopropanols are converted to alkyl radicals and undergo 1,6-conjugate addition to p-quinone methides toward C–C bond formation. The salient features of this methodology include operationally simple and mild reaction
Construction of Polyheterocyclic Skeletons through C−H Bond Activation‐Initiated Cascade Reactions by Using Cyclopropanol as Alkylating Agent as well as Masked Nucleophile and Electrophile
作者:Xueying Yang、Xinyuan Cai、Xinying Zhang、Xuesen Fan
DOI:10.1002/adsc.202301172
日期:2024.1.9
azomethine imine with cyclopropanol through in situ ring-opening, followed by cascade intramolecular C- and N-nucleophilic addition. In this tandem process, cyclopropanol acts as not only an alkylating agent but also masked nucleophile and electrophile to participate in the construction of both the indane and the bicyclic pyrazolidinone scaffolds. To our knowledge, such a cascade reaction pattern has not been