A copper catalyzed ring-opening trifluoromethylation of cyclopropanols under mild reaction conditions was developed. A wide variety of synthetically useful β-trifluoromethyl ketones were obtained.
Rhodium-Catalyzed C2-Alkylation of Indoles with Cyclopropanols Using <i>N</i>,<i>N</i>-Dialkylcarbamoyl as a Traceless Directing Group
作者:Kuppan Ramachandran、Pazhamalai Anbarasan
DOI:10.1021/acs.orglett.2c02527
日期:2022.9.23
An efficient rhodium-catalyzed synthesis of C2-alkylated NH-free indoles has been achieved from substituted indoles and cyclopropanols. The reaction allows the synthesis of various C2-alkylated products in good to excellent yield. Important features of the method include the use of a N,N-dialkylcarbamoyl group as a traceless directing group, C–H/C–C bond functionalization, good functional group tolerance
已经从取代的吲哚和环丙醇实现了有效的铑催化合成 C2-烷基化的无 NH 吲哚。该反应允许以良好至优异的产率合成各种 C2 烷基化产物。该方法的重要特点包括使用N,N-二烷基氨基甲酰基作为无痕导向基团,C-H/C-C键官能化,良好的官能团耐受性,适用范围广,可合成吡咯并[1,2- a ]吲哚,并鉴定潜在的中间体。
Cobalt-catalyzed atom-economical and regioselective hydroalkylation of N-Boc-2-azetine with cobalt homoenolates
作者:Mingxia Li、Qinglei Chong、Fanke Meng
DOI:10.1016/j.tetlet.2023.154479
日期:2023.5
Chelation-Assisted Rhodium-Catalyzed Alkylation of a 1-Arylpyrazole C–H Bond with Cyclopropanols
作者:Pazhamalai Anbarasan、Kuppan Ramachandran
DOI:10.1055/a-1970-8537
日期:——
A general and efficient rhodium-catalyzed ortho-alkylation of N-arylpyrazoles has been accomplished with cyclopropanols as coupling partners. The reaction involves cleavage of both a C–H bond of the arene and a C–C bond of the cyclopropanol, and it offers access to a diversity of substituted 1-(ortho-alkylaryl)-1H-pyrazoles in good to excellent yields. In addition, nonsymmetrical dialkylation and a
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.