Palladium-catalyzed dearomative 1,4-difunctionalization of naphthalenes
作者:Ping Yang、Chao Zheng、Yu-Han Nie、Shu-Li You
DOI:10.1039/d0sc02816a
日期:——
A highly diastereoselective dearomatization of naphthalenes via a Pd-catalyzed 1,4-difunctionalization reaction is described. In the presence of a commercially available palladium precursor and ligand, intramolecular dearomative Heck-type insertion provides π-allylpalladium intermediates which are readily captured by a series of nucleophiles in excellent yields (up to 99%). This reaction features mild
Trifluoroacetic Acid-Promoted Synthesis of 3-Hydroxy, 3-Amino and Spirooxindoles from α-Keto-<i>N</i>-Anilides
作者:Ioulia Gorokhovik、Luc Neuville、Jieping Zhu
DOI:10.1021/ol202263a
日期:2011.10.21
Ketoanilides containing alkyl side chains were readily cyclized to 3-hydroxy-2-oxindoles or spirooxindoles by a single or double intramolecular Friedel-Crafts reaction in the presence of trifluoroacetic acid (TFA) at room temperature or at 45 degrees C. alpha-Iminocarboxamides, generated in situ from ketoamides, cyclized similarly to 3-aminooxindoles under identical conditions,