Mechanically Induced Fe(III) Catalysis at Room Temperature: Solvent-Free Cross-Dehydrogenative Coupling of 3-Benzylic Indoles with Methylenes/Indoles
作者:Jing-Bo Yu、Yang Zhang、Zhi-Jiang Jiang、Wei-Ke Su
DOI:10.1021/acs.joc.6b02197
日期:2016.11.18
An Fe(III)-catalyzed solvent-free cross-dehydrogenativecoupling of 3-benzylic indoles and compounds with acidic methylene groups has been achieved under high-speed ball-milling (HSBM) conditions at roomtemperature. The reactions afford desired 3-arylmethylindole derivatives in moderate to high yields within 21 min of grinding. Besides, both N-substituted and N-free indoles can take part in this mechanochemical
An enantioselective cascade aerobic oxidation and semipinacol rearrangement reaction of 2‐aryl‐3‐alkyl‐substituted indoles via visible‐light‐driven cooperative organophotoredox and H‐bonding catalysis is reported. The current method provides an expedient and sustainable approach to furnish a variety of valuable chiral 2‐aryl‐2‐alkyl‐substituted indolin‐3‐ones in 64–90 % yield with 58–94 % ee. Preliminary
Enantioselective Oxidative Cross-Coupling Reaction of 3-Indolylmethyl CH Bonds with 1,3-Dicarbonyls Using a Chiral Lewis Acid-Bonded Nucleophile to Control Stereochemistry
作者:Chang Guo、Jin Song、Shi-Wei Luo、Liu-Zhu Gong
DOI:10.1002/anie.201002108
日期:——
A highly enantioselective CH‐activation‐based oxidativecouplingreaction of 3‐arylmethylindole derivatives with dibenzyl malonate by using chiral Lewis acid bonded nucleophiles provided an approach to indole derivatives (see scheme; DDQ=2,3‐dichloro‐5,6‐dicyano‐1,4‐benzoquinone, OTf=trifluoromethanesulfonate).