unprecedented [4 + 2] annulation reaction between in situ formed azoalkenes and azlactones has been developed. This reaction provides a facile access to an array of 4,5-dihydropyridazin-3(2H)-one derivatives, which are very promising in medicinal applications as potential biologically active candidates. Notably, these dihydropyridazinones could also be synthesized via a one-potreaction protocol by using the
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