β-Lactam compounds play a key role in medicinal chemistry, specifically as the most important class of antibiotics. Here, we report a novel one-step approach for the synthesis of α-(trifluoromethyl)-β-lactams and related products from fluorinated olefins, anilines and CO. Utilization of an advanced palladium catalyst system with the Ruphos ligand allows for selective cycloaminocarbonylations to give
β-内酰胺化合物在药物化学中发挥着关键作用,特别是作为最重要的一类抗生素。在此,我们报告了一种从氟化烯烃、苯胺和 CO 合成 α-(三氟甲基)-β-内酰胺及相关产品的新型一步法。利用先进的钯催化剂系统和 Ruphos 配体可以选择性地环氨基羰基化高产率地产生多种氟化 β-内酰胺。
Asymmetric Allylation/RCM-Mediated Synthesis of Fluorinated Benzo-Fused Bicyclic Homoallylic Amines As Dihydronaphthalene Derivatives
作者:Daniel M. Sedgwick、Pablo Barrio、Antonio Simón、Raquel Román、Santos Fustero
DOI:10.1021/acs.joc.6b01590
日期:2016.10.7
Enantiomericallyenriched fluorinated benzo-fused bicyclic homoallylic amines have been synthesized through an asymmetricallylation/ring closing metathesis (RCM) sequence. This sequence has been carried out using α-trifluoromethylstyrene derivatives as key intermediates, synthesized by microwave radiation. The great deactivating effect exerted by such substituents has been brought to light by a comparative
The synthesis of several 1,1-disubstituted trifluoromethyl-cyclopropanes (TFCPs), known as tert-butyl bioisosteres, has been achieved from the reaction between trifluoromethylalkenes and unstabilized sulfonium ylides in yields of ≤97%. This method offers practical access to this cyclopropyl moiety of pharmacological interest, employing a commercially available reagent at low temperatures. The synthesis
Synthesis of Fluoro- and Perfluoroalkyl Arenes via Palladium-Catalyzed [4 + 2] Benzannulation Reaction
作者:Olga V. Zatolochnaya、Vladimir Gevorgyan
DOI:10.1021/ol401057z
日期:2013.5.17
Pd-catalyzed [4 + 2] cross-benzannulation is presented. The synthetic utility of these products for the synthesis of various aromatic and heteroaromatic compounds is also demonstrated. This strategy offers a viable and quite general alternative to existing fluorination and perfluoroalkylation methods for securing these valuable molecules.