Rhenium-Catalyzed Synthesis of Indenones by Novel Dehydrative Trimerization of Aryl Aldehydes via C−H Bond Activation
摘要:
By heating aryl aldehydes with catalytic amounts of a rhenium complex, ReBr(CO)(5), and N-phenylacetamide in toluene, indenone derivatives are obtained in good to excellent yields. This reaction proceeds via (1) the formation of an isobenzofuran derivative by the insertion of an aldehyde into the C-H bond of another aldehyde (C-H bond activation) and successive intramolecular nucleophilic cyclization, (2) nucleophilic addition of the formed isobenzofuran derivative to the third aldehyde, (3) isomerization, and (4) intramolecular aldol condensation.
MeOTf-induced carboannulation of arylnitriles and aromatic alkynes: a new metal-free strategy to construct indenones
作者:Xiaoyu Yan、Song Zou、Peng Zhao、Chanjuan Xi
DOI:10.1039/c4cc00088a
日期:——
MeOTf-induced carboannulation of arylnitriles and aromatic alkynes for synthesis of indenones under metal-free conditions has been described. When ortho-substitutedbenzonitriles were used, indeno[1,2-c]isoquinolines were formed.
dioxygenase family of enzymes that in humans is involved in DNA dealkylation repair. Because of its role in promoting tumor cell proliferation and metastasis of cancer, extensive efforts are being directed in developing selective inhibitors for AlkBH3. Here we report synthesis, screening and evaluation of panel of arylated indenone derivatives as new class of inhibitors of AlkBH3 DNA repair activity. An efficient
DTBP-mediated controlled oxidative C–S bond cleavage/annulation cascade: construction of indenones
作者:Farnaz Jafarpour、Banafshe Rahimi
DOI:10.1039/d2nj06286k
日期:——
A novel controlled DTBP-mediated oxidative C–S bond cleavage/annulation cascade is devised. This approach enables the controlled formation of carbonyl intermediates frombenzyl thioethers to participate in annulation reactions with alkynes to offer privileged indenone skeletons.
By heating aryl aldehydes with catalytic amounts of a rhenium complex, ReBr(CO)(5), and N-phenylacetamide in toluene, indenone derivatives are obtained in good to excellent yields. This reaction proceeds via (1) the formation of an isobenzofuran derivative by the insertion of an aldehyde into the C-H bond of another aldehyde (C-H bond activation) and successive intramolecular nucleophilic cyclization, (2) nucleophilic addition of the formed isobenzofuran derivative to the third aldehyde, (3) isomerization, and (4) intramolecular aldol condensation.
Solvent controlled synthesis of 2,3-diarylepoxy indenones and α-hydroxy diarylindanones and their evaluation as inhibitors of DNA alkylation repair
作者:Rollania Negi、Tapan Kumar Jena、Jyoti、Nikhil Kumar Tuti、Roy Anindya、Faiz Ahmed Khan
DOI:10.1039/d2ob00595f
日期:——
on the conditions. Several bioactive epoxy indenones and one-pot α-hydroxy indanones (α-acyloin) were synthesized from 2,3-diaryl dihydroindanone and 2,3-diarylindenone, respectively. A plausible reaction mechanism is also proposed, where oxygenation would take place at the α-position and further proton abstraction from the β-position leads to epoxy indenone derivatives. A one-pot cis-hydroxy indanone