Synthesis of 2,2,5-Trisubstituted 2<i>H</i>-Pyrroles and 2,3,5-Trisubstituted 1<i>H</i>-Pyrroles by Ligand-Controlled Site-Selective Dearomative C2-Arylation and Direct C3-Arylation
作者:Miyuki Yamaguchi、Sakiko Fujiwara、Kei Manabe
DOI:10.1021/acs.orglett.9b02559
日期:2019.9.6
Palladium-catalyzed site-selective dearomative C2-arylation of 2,5-diaryl-1H-pyrroles with aryl chlorides was accomplished, and a series of 2,2,5-triaryl-2H-pyrroles were synthesized. In addition, the site selectivity of the reaction was switched by simply changing the ligand, and the direct C3-arylated 2,3,5-triaryl-1H-pyrroles were prepared. The obtained 2,2,5-triaryl-2H-pyrroles could be further
2,5-二芳基-1H-吡咯与芳基氯化物的钯催化的位点选择性脱芳香C2-芳基化反应,合成了一系列的2,2,5-三芳基-2H-吡咯。另外,通过简单地改变配体来改变反应的位点选择性,并制备了直接的C3-芳基化的2,3,5-三芳基-1H-吡咯。所获得的2,2,5-三芳基-2H-吡咯可以进一步转化为2,2,5,5-四芳基吡咯烷。