BF<sub>3</sub>·OEt<sub>2</sub>-TFAA Mediated Tetra-Functionalization of Amino Acids - Synthesis of Di- and Tri-Substituted 2-Trifluoromethyl Oxazoles in One Pot
作者:Velusamy Karuppusamy、Andivelu Ilangovan
DOI:10.1021/acs.orglett.0c02484
日期:2020.9.18
A highly efficient, TFAA-BF3·OEt2 mediated multicomponent coupling of amino acid, TFAA, and aromatics provides a broad library of 2-trifluoromethyl equipped 2,5-disubstituted/2,4,5-trisubstituted oxazoles or N-(trifluoroacetyl)-β-aminoalkyl ketones. This amino acid tetra-functionalization approach involves amidation (C–N), anhydride (C–O), Friedel–Crafts acylation (C–C), and Robinson–Gabriel annulation
氨基酸,TFAA和芳香族化合物的高效,TFAA-BF 3 ·OEt 2介导的多组分偶联提供了配备2-三氟甲基的2,5-二取代/ 2,4,5-三取代的恶唑或N-(三氟乙酰基)的宽泛文库)-β-氨基烷基酮。这种氨基酸四官能化方法包括酰胺化(C–N),酸酐(C–O),弗瑞德-克拉夫茨酰化(CC)和鲁宾逊-加布里埃尔环化(C–O),然后进行脱水芳构化。使用容易获得的氨基酸和芳族化合物,该反应在操作简单,温和且不含金属的条件下进行。