Synthesis of multisubstituted pyrroles by ligand-controlled site-selective arylation and their transformation into multiarylated pyrrolines and pyrrolidines
作者:Miyuki Yamaguchi、Sakiko Fujiwara、Yukiko Mori、Hideyuki Konishi、Kei Manabe
DOI:10.1016/j.tet.2022.132962
日期:2022.9
Multisubstituted pyrroles were prepared by Pd-catalyzed site-selective arylation of 2,5-disubstituted 1H-pyrroles with aryl chlorides, triflates, or nonaflates. Site-selectivity of the reaction was controlled using appropriate ligands, and 2,2,5-trisubstituted 2H-pyrroles were synthesized via dearomative C2-arylation. Moreover, 2,3,5-trisubstituted 1H-pyrroles were successfully fabricated by direct
多取代的吡咯是通过 Pd 催化的 2,5-二取代的 1 H-吡咯与芳基氯化物、三氟甲磺酸酯或九氟甲磺酸酯的位点选择性芳基化来制备的。使用适当的配体控制反应的位点选择性,并通过脱芳烃 C2-芳基化合成 2,2,5-三取代的 2 H-吡咯。此外,通过直接C3-芳基化成功制备了2,3,5-三取代的1 H-吡咯。这些芳基化可应用于带有芳基氯部分的药物。此外,2,2,5-三芳基-2 H-吡咯被转化为多芳基化吡咯啉和吡咯烷,可用于合成和药物化学。