A new, practical and efficient sulfone-mediated synthesis of trifluoromethyl ketones from alkyl and alkenyl bromides
摘要:
We report herein a new and efficient method to prepare trifluoromethyl ketones from the corresponding bromides through sulfones in good yields. (c) 2005 Elsevier Ltd. All rights reserved.
A General Approach to Intermolecular Olefin Hydroacylation through Light‐Induced HAT Initiation: An Efficient Synthesis of Long‐Chain Aliphatic Ketones and Functionalized Fatty Acids
作者:Subhasis Paul、Joyram Guin
DOI:10.1002/chem.202004946
日期:2021.3
hydroacylation protocol applies to a wide array of substrates bearing numerous functional groups and many complex structural units. The reaction proves to be scalable (up to 5 g). Different functionalized fattyacids, petrochemicals and naturally occurring alkanes can be synthesized with this protocol. A radical chain mechanism is implicated in the process.
Herein, we present a simplified reaction protocol for the dearomatization of bicyclic azaarenes via photochemical cycloaddition with alkenes using an Ir(III) photosensitizer, trifluoroacetic acid (TFA), dichloroethane, and a blue light-emitting diode. An efficient protonation of azaarenes with TFA enhances the reactivity of triplet azaarene toward olefins, enabling the photocycloaddition under aerobic
An atom-economical strategy for rapid access to β-keto primary chlorides by regioselective chlorocarbonylation of alkenes was developed using dual Ni/photoredox catalysis. The transformation features broad functional group tolerance and operational simplicity. Preliminary control experiments and DFT mechanistic studies suggest the photocatalytic generation of Cl⋅ and subsequent addition to the alkene