A new and feasible synthetic method for ureas, carbamates and thiocarbamate from hydroxamic acid and Tf2O via Lossen rearrangement has been developed. The use of Tf2O was chemoselective with hydroxamate group with broad substrate applicability and good functional group tolerance. Further pathway of the mechanism was analysed through computational studies.
开发了一种新的、可行的由异羟
肟酸和Tf 2 O通过Lossen重排合成
脲、
氨基甲酸酯和
硫代
氨基甲酸酯的方法。 Tf 2 O的使用对异羟
肟酸基团具有
化学选择性,具有广泛的底物适用性和良好的官能团耐受性。通过计算研究分析了该机制的进一步途径。