Phenanthridinone alkaloids crinasiadine 1 and N‐alkylcrinasiadines 6, 7, 8, 9, 10 have been synthesized based on palladium‐catalyzed tandem C–C and C–N bond formation starting from 2‐aminophenylboronic acid and 2‐bromobenzoate in short steps. Related alkaloids, 5,6‐dihydrobicolorine 2, trisphaeridine 3, and bicolorine 12 have also been synthesized.
Access to quinolinones <i>via</i> DMAP-catalysed cascade reaction of 2-substituted benzoic acids with organic azides
作者:Yuan-Yuan He、Mei-Shan Zhu、Yang Gao、Xiao-Qiang Hu
DOI:10.1039/d2cc04406d
日期:——
DMAP-catalysed Curtius rearrangement and intramolecular cyclisation cascade reaction of 2-substituted aryl carboxylic acids with organicazides for the first time. This protocol features simple operation, broad scope and metal-free conditions, furnishing a broad spectrum of biologically attractive heterocycles. The synthetic virtue of this reaction was demonstrated by gram-scale synthesis and applicability toward