Synthesis of 2‐Amino Substituted Oxazoles from α‐Amino Ketones and Isothiocyanates
            <i>via</i>
            Sequential Addition and I
            <sub>2</sub>
            ‐Mediated Desulfurative Cyclization
                                
                                    
                                        作者:Shuangshuang Zhang、Qiongli Zhao、Yifei Zhao、Wenquan Yu、Junbiao Chang                                    
                                    
                                        DOI:10.1002/adsc.202000171
                                    
                                    
                                        日期:2020.5.12
                                    
                                    Oxazol‐2‐amines were synthesized by annulation of α‐amino ketones and isothiocyanates. This sequential synthetic process involves addition of α‐amino ketones to isothiocyanates and I2‐promoted desulfurative cyclization omitting isolation of the less stable thiourea intermediates. It is transition metal‐free and operationally simple, providing access to a variety of 2‐amino substituted oxazole derivatives
                                    草酸-2-胺是通过环α-
氨基酮和异
硫氰酸酯合成的。该顺序合成过程涉及将α-
氨基酮添加至异
硫氰酸酯和I 2促进的脱
硫环化反应,从而省去了较不稳定的
硫脲中间体的分离。它不含过渡
金属,操作简单,可在温和的反应条件下使用各种2-
氨基取代的
恶唑衍
生物。