Transition-metal-free synthesis of indole-fused dibenzo[b,f][1,4]oxazepines via Smiles rearrangement
作者:Fangdong Hu、Huanhuan Liu、Jiong Jia、Chen Ma
DOI:10.1039/c6ob02098d
日期:——
transition-metal-free approach for the synthesis of indole-fused dibenzo[b,f][1,4]oxazepines from 2-(1H-indol-2-yl)phenol and 1,2-dihalobenzenes or 2 halonitroarenes has been developed. The proposed mechanism for this transformation features a Smiles rearrangement favoured over a direct intramolecular nucleophilic cyclization, which affords the corresponding products in different regioselectivities
[EN] TETRACYCLIC HETEROCYCLE COMPOUNDS AND METHODS OF USE THEREOF FOR THE TREATMENT OF VIRAL DISEASES<br/>[FR] COMPOSÉS HÉTÉROCYCLIQUES TÉTRACYCLIQUES ET LEURS PROCÉDÉS D'UTILISATION POUR LE TRAITEMENT DE MALADIES VIRALES
申请人:MERCK SHARP & DOHME
公开号:WO2013033971A1
公开(公告)日:2013-03-14
The present invention relates to compounds of formula (I) that are useful as hepatitis C virus (HCV) NS5B polymerase inhibitors, the synthesis of such compounds, and the use of such compounds for inhibiting HCV NS5B polymerase activity, for treating or preventing HCV infections and for inhibiting HCV viral replication and/or viral production in a cell-based system.
One-Pot Highly Regioselective Synthesis of Indole-Fused Pyridazino[4,5-b][1,4]benzoxazepin-4(3H)-ones by a Smiles Rearrangement
作者:Xiaolei Jiang、Fangdong Hu
DOI:10.1055/s-0037-1609338
日期:2018.6
A simple and convenient synthesis of indole-fused pyridazino[4,5-b][1,4]benzoxazepin-4(3H)-ones is described. A range of 2-(1H-indol-2-yl)phenols and 4,5-dichloropyridazin-3-ones are compatible with this reaction. A Smiles rearrangement is proposed as a key step in the highly regioselective construction of the products. The easy availability of the starting materials makes this an appealing method
Metal-free TFA promoted arylation/heteroarylation was achieved under mild conditions via the reaction of chloro-derivatives of nitrogen heterocycles [e. g., =C−C(Cl)=N−] with electronrich arenes/heteroarenes. It was also observed that apart from participating in the heteroarylation step, TFA was able to facilitate the hydroarylation/o-arylation process in the same pot affording the carbazole/oxepine
Various oxepine and azepine fused N-heterocyclic derivatives were synthesized using a new and one-pot reaction of 2,3-dichloro quinoxaline/pyrazine with 2-(1H-indol-2-yl)phenol/aniline in the presence of 25 mol% FeCl3. The reaction proceeded via C–C bond followed by C–X (X = O or N) bond formation to construct the central 7-membered ring, affording the desired products in good yields. The structure