Regioselective Synthesis of 3-Trifluoromethylpyrroles by [3 + 2] Cycloaddition of <i>N</i>-Acyl α-Amino Acids and 2-Bromo-3,3,3-trifluoropropene
作者:Weidi Zeng、Hui Li、Duozhi Wang、Lei Zhou
DOI:10.1021/acs.joc.3c01611
日期:2023.10.6
A mild and concise method for the synthesis of 3-trifluoromethylpyrroles via base-mediated [3 + 2] cycloaddition of N-acyl α-amino acids and 2-bromo-3,3,3-trifluoropropene is described. N-Acyl α-amino acids serve as 1,3-dipole precursors without additional activating agents directly. A high level of regioselectivity was observed, regardless of the electronic nature and size of the substituents on 1
描述了一种通过N-酰基 α-氨基酸和 2-溴-3,3,3-三氟丙烯的碱介导 [3 + 2] 环加成合成 3-三氟甲基吡咯的温和而简洁的方法。N-酰基 α-氨基酸直接用作 1,3-偶极子前体,无需额外的活化剂。无论 1,3-偶极子上取代基的电子性质和大小如何,都观察到高水平的区域选择性。