Functionalized Naphthalenes by Benzotriazole-Mediated Annulation
摘要:
The anions of 3-benzotriazolylphthalide (1) and of 2-(benzotriazolylmethyl)benzonitrile (6) condense regioselectively with a range of Michael accepters to form 1,4-dihydroxynaphthalenes 4b-f and 1-amino-2,3-di(methoxycarbonyl)naphthalene (9) in moderate to good yields.
Gold‐Catalyzed Carbocyclization/C=N Bond Formation Cascade of Alkyne‐Tethered Diazo Compounds with Benzo[
<i>c</i>
]isoxazoles for the Assembly of 4‐Iminonaphthalenones and Indenes
作者:Ming Bao、Xiongda Xie、Wenhao Hu、Xinfang Xu
DOI:10.1002/adsc.202100602
日期:2021.8.13
carbocyclization/C=Nbondformation cascade reaction has been developed for the synthesis of polyfunctionalized 4-iminonaphthalenones and indenes in good to high yields under mild reaction conditions. The reaction goes through 5/6-endo-dig diazo-yne carbocyclization to form the endocyclic vinyl carbene species from corresponding alkyne-tethered diazo compounds, followed by electrophilic addition/N−O bond cleavage/aromatization