Aryne Insertion Reactions Leading to Bioactive Fused Quinazolinones: Diastereoselective Total Synthesis of Cruciferane
作者:Sagar D. Vaidya、Narshinha P. Argade
DOI:10.1021/ol4018062
日期:2013.8.2
Insertion reactions of an in situ generated arynes to a variety of suitably substituted 1,3-quinazolin-4-ones have been demonstrated for a new efficient one-step approach to a diverse range of fused quinazolinone architectures. The present protocol has been effectively utilized to accomplish the concise total synthesis of recently isolated bioactive natural products tryptanthrin, phaitanthrins A-C, and cruciferane.
Visible‐Light‐Induced Aerobic Intramolecular Cyclization of (2‐Aminophenyl)(1<i>H</i>‐indol‐1‐yl)methanones: Direct Access to Bioactive Tryptanthrin and its Derivatives
Visible-light-induced mild, transition metal, base, and photocatalyst-free green protocol has been developed for the synthesis of tryptanthrin and its derivatives. The present reaction is compatible with a wide range of substrates with good to high yields. Further, a novel synthetic transformation of tryptanthrin derivatives has been achieved by the decarboxylative addition of cyanoacetic acid for
Nickel‐Catalyzed Intramolecular Dual Annulation Reaction of Alkyl Nitrile‐Containing 1,2,3‐Benzotriazin‐4(3<i>H</i>)‐ones: A Pathway to Access Diversely Polycyclic Quinazolinone Alkaloids
作者:Vijaykumar H. Thorat、Yong‐Ran Huang、Hao‐Yu Chao、Jen‐Chieh Hsieh
DOI:10.1002/adsc.202301512
日期:——
Herein, we report a nickel‐catalyzed intramolecular dual annulation reaction of alkyl nitrile‐containing 1,2,3‐benzotriazine‐4(3H)‐ones to synthesize polycyclic quinazolinones. This catalytic reaction can construct the core structure of polycyclic quinazolinone alkaloids; therefore, we also apply this reaction as the critical step to access fifteen relevant alkaloids to demonstrate efficacy.