A manganese-catalyzed ring-opening coupling reaction of cyclopropanols with enones for the facile and efficient preparation of 1,6-diketones is described. A wide array of synthetically important 1,6-diketones bearing manifold functional groups are obtained with up to 93% yield. These reactions feature broad substrate scopes, environmentally benign conditions, inexpensive catalyst, and operational simplicity
Iron catalyzed tandem ring opening/1,6-conjugate addition of cyclopropanols with <i>p</i>-quinone methides: new access to γ,γ-diaryl ketones
作者:Sachin R. Shirsath、Sagar M. Chandgude、M. Muthukrishnan
DOI:10.1039/d1cc05997a
日期:——
An iron(III) catalyzed tandem ring opening/1,6-conjugate addition of cyclopropanols to p-quinone methides leading to γ,γ-diaryl ketones has been described. This catalytic protocol provides a novel and efficient method to access γ,γ-diaryl ketone derivatives in good to excellent yields with high functional group tolerance. Importantly, γ,γ-diaryl ketone can be further functionalized to give a versatile
Stereoselective Iron-Catalyzed Alkylation of Enamides with Cyclopropanols via Oxidative C(sp<sup>2</sup>)–H Functionalization
作者:Xing Zhang、Tian-Ming Yang、Lu-Min Hu、Xu-Hong Hu
DOI:10.1021/acs.orglett.2c03563
日期:2022.12.2
Established herein is a radical-mediated C–H alkylation of enamides with cyclopropanols. An environmentally benign catalytic system with iron salt and air is used to permit the oxidative coupling process. The protocol demonstrates a broad substrate scope, allowing the stereoselective synthesis of alkylated enamides. The value of this strategy is further reflected by late-stage diversification of complex
Copper-catalyzed ring-opening trifluoromethylthiolation/trifluoromethylselenolation of cyclopropanols with TsSCF<sub>3</sub>or<i>Se</i>-(trifluoromethyl) 4-methoxybenzenesulfonoselenoate
作者:Ankun Li、Xiaoxing Wang、Yuqing Liu、Delong Hao、Xia Zhao、Kui Lu
DOI:10.1039/d3ob00228d
日期:——
n of cyclopropanols with Se-(trifluoromethyl) 4-methoxybenzenesulfonoselenoate to access β-SeCF3-substituted carbonylcompounds is achieved for the first time. The broad substrate scope, readily accessible reagents and cheap catalyst make this protocol an alternative and efficient method for the synthesis of β-SCF3-substituted or β-SeCF3-substituted carbonylcompounds.