THE NOVEL SYNTHESES OF α-TRIFLUOROMETHYLATED KETONES FROM β-BROMOENOL PHOSPHATES
摘要:
A series of 1-aryl-3,3,3-trifluro-1-propanones have been synthesized from the reaction of FO2SCF2CO2Me with beta -bromoenol phosphates in the presence of Cul in moderate yield. The reaction mechanism was discussion, the electron-withdrawing substituent at the beta -position of the enol phosphates promoted the catalytic cleavage of the O-P bond in enol phosphates by fluoride ion.
Radical Desulfur‐Fragmentation and Reconstruction of Enol Triflates: Facile Access to α‐Trifluoromethyl Ketones
作者:Xiaolong Su、Honggui Huang、Yaofeng Yuan、Yi Li
DOI:10.1002/anie.201608507
日期:2017.1.24
efficient oxidative radical desulfur‐fragmentation and reconstruction of enoltriflates for the synthesis of α‐CF3 ketones. Preliminary mechanistic studies disclosed that oxidative fragmentation to release a CF3 radical from the triflyl group of enoltriflate and subsequent addition of the CF3 radical to another enoltriflate form the desired α‐CF3 ketones. This method provides a new approach to α‐CF3
Visible light induced Trifluoromethyl Migration: Easy Access to α-Trifluoromethylated Ketones from Enol Triflates
作者:Shuyang Liu、Jiyang Jie、Jipan Yu、Xiaobo Yang
DOI:10.1002/adsc.201701051
日期:2018.1.17
Herein, we reported a novel method to synthesize α-trifluoromethylated ketones from enol triflates. Involving a cascade sulfurdioxide extrusion and a CF3 (trifluoromethyl) radical addition process, this reaction proceeds at room temperature and is driven by visible light irradiation. This protocol bears good functional group compatibility, which can generate the desired products in good to excellent
Scissoring Enaminone C═C Double Bond by Free Radical Process for the Synthesis of α-Trifluoromethyl Ketones with CF<sub>3</sub>SO<sub>2</sub>Na
作者:Lu Gan、Qing Yu、Yunyun Liu、Jie-Ping Wan
DOI:10.1021/acs.joc.0c02431
日期:2021.1.1
The C═C double bond cleavage on tertiary enaminones, enabling the formation of a new C–CF3 bond, has been realized as a practical method for the synthesis of α-trifluoromethyl ketones with only the promotion of TBHP and ambient heating. Control experiments support that the reactions proceed via a featured freeradical process. The deuterium labeling experiment employing D2O indicates that water participated
Graphitic Carbon Nitride as a Metal‐Free Heterogeneous Semiconductor Photocatalyst for Fluoroalkylation Reactions
作者:Hao Wang、Fukai Xie、He Wang、Wen Dai
DOI:10.1002/cctc.202301728
日期:2024.7.8
In this article, we describe a stable semiconductor material, g-CN nanosheets, can serve as a heterogeneous photocatalyst to accomplish intermolecular fluoroalkylation of assorted alkenes with fluoroalkanesulfinates and intramolecular fluoroalkyl migration of alkenyl triflates. The inexpensive and easy-prepared g-CN nanosheets can be recycled for several runs with conserved activity.