26477-10-1

Upstream product

• 119072-54-7 2,6-dimethylphenyl isonitrile 
• 120-20-7 2-(3,4-dimethoxyphenyl)-ethylamine 
• 119-67-5 o-carboxybenzaldehyde 
• 4122-56-9 methyl o-formylbenzoate 
• 85-44-9 phthalic anhydride 
• 548448-36-8 N,N-bis-(3,4-dimethoxy-β-phenylethyl)-o-phthalamide 
• 63375-81-5 2-(2-bromo-4,5-dimethoxyphenylphenyl)ethan-1-amine 
• 493-49-2 6,7-dimethoxy-3,4-dihydro-2H-isoquinolin-1-one 

Relevant academic research and scientific papers

Synthesis of isoindolo[1,2-a]isoquinoline and isoindolo[2,1-a]quinoline derivatives via trifluoroacetic acid-mediated cascade reactions

Condensation of methyl 2-acylbenzoates with 2-arylethanamines or 2-acylanilines in the presence of trifluoroacetic acid resulted in the formation of isoindolo[1,2-a]isoquinolines or isoindolo[2,1-a]quinolines, respectively, in moderate to excellent isolated yields.

Propylphosphonic anhydride (T3P) mediated synthesis of 3-oxoisoindoline-1-carboxamides from 2-formylbenzoic acid, amines, and isocyanides. Preparation of isoindolinone alkaloids

Propylphosphonic anhydride (T3P) was successfully applied to the synthesis of an isoindolinone library by the utilization of an Ugi four-center, three-component reaction (Ugi-4C-3CR). The use of T3P significantly shortened the required reaction time and t

IinQ attenuates systemic inflammatory responses via selectively impairing the Myddosome complex formation upon TLR4 ligation

A specific small-molecule inhibitor of the TLR4 signaling complex upstream of the IKK would likely provide therapeutic benefit for NF-κB-mediated inflammatory disease. We previously identified brazilin as a selective upstream IKK inhibitor targeting the Myddosome complex. In this study, using a cell-based ubiquitination assay for IRAK1 and a chemical library comprising a series of structural analogues of brazilin, a novel small molecule, 2-hydroxy-5,6-dihydroisoindolo[1,2-a]isoquinoline-3,8-dione (IinQ), was identified as a selective and potent inhibitor of IRAK1-dependent NF-κB activation upon TLR4 ligation. In RAW264.7 macrophages, IinQ drastically suppressed activation of upstream IKK signaling events including membrane-bound IRAK1 ubiquitination and IKK phosphorylation by the TLR4 ligand, resulting in reduced expression of proinflammatory mediators including IL-6, TNF-α, and nitric oxide. Interestingly, IinQ did not suppress NF-κB activation via the TLR3 ligand, DNA damaging agents, or a protein kinase C activator, indicating IinQ is specific for TLR4 signaling. Analysis of upstream signaling events further confirmed that IinQ disrupts the MyD88-IRAK1-TRAF6 complex formation induced by LPS treatment, without affecting TLR4 oligomerization. Moreover, intravenous administration of IinQ significantly reduced lethality and attenuated systemic inflammatory responses in an in vivo mouse model of endotoxin shock following LPS challenge. Thus, IinQ represents a novel class of brazilin analogues with improved potency and specificity toward disruption of Myddosome complex formation in TLR4 signaling, indicating that IinQ may be a promising therapeutic candidate for the treatment of systemic inflammatory diseases.

Copper-catalyzed C(sp3)-oh cleavage with concomitant c-c coupling: Synthesis of 3-substituted isoindolinones

Copper(II) trifluoromethanesulfonate (Cu(OTf)2) efficiently catalyzes the C-C coupling of 3-hydoxyisoindolinones with a variety of aryl-, heteroaryl-, and alkenylboronic acids to furnish C(3) aryl-, heteroaryl-, and alkenyl-substituted isoindolinones. The coupling reactions work smoothly in 1,2-dicholoroethane (DCE) reflux, to effect both inter- and intramolecular versions. This is the first report on C(sp3)-OH cleavage with concomitant C-C coupling. The photolabile 2-nitrobenzyl protecting group is most appropriate for promotion of the coupling reaction and for deprotection. The tetracyclic ring motif of the alkaloid neuvamine was prepared by applying the newly developed copper-catalyzed C-C coupling.

Synthesis of bis-Tetrahydroisoquinolines Based on Homoveratrylamine and Dibasic Acids. 2.

Bis-tetrahydroisoquinolines were prepared from homoveratrylamine and phthalic acids using a Bischler-Napieralski reaction. Their structures were confirmed by IR and NMR spectral data.

Multimetallic iridium-tin (Ir-Sn3) catalyst in N-acyliminium ion chemistry: Synthesis of 3-substituted isoindolinones via intra- and intermolecular amidoalkylation reaction

The multimetallic iridium-tritin (Ir-Sn3) complex [Cp*Ir(SnCl3)2{SnCl2(H2O) 2}] (1) proved to be a highly effective catalyst towards C-OH bond activation of γ-hydroxylactams, leading to a nucleophilic substitution reaction known as the α-amidoalkylation reaction. Catalyst 1 can be easily synthesized from the reaction of (pentamethylcyclocyclopentadienyl)iridium dichloride dimer {[Cp*IrCl2]2} and tin(II) dichloride (SnCl2). In terms of catalyst loading, reaction conditions and yields of the product formed, 1 is found to be superior compared to classical Lewis acid catalysts. Different carbon (arenes, heteroarenes, allyltrimethylsilane, 1,3-dicarbonyls) and heteroatom (alcohols, thiols, amides and sulfonamides) nucleophiles have been successfully employed in the intramolecular and intermolecular alkylations, as well as in heterocyclization reactions. In the majority of cases good to excellent yields of 3-substituted isoindolinones and 5-substituted pyrrolidin-2-ones have been obtained. Besides, the reactions are also atom economical and salt free. It is proposed that the multimetallic Ir-Sn3 catalyst behaves as a mild and selective Lewis acid to activate the γ-hydroxylactam towards the formation of the N-acyliminium ion; the latter being trapped by potent nucleophiles leading to the desired products.

Construction of the six- and five-membered aza-heterocyclic units of the isoindoloisoquinolone nucleus by parham-type cyclization sequences - Total synthesis of nuevamine

An efficient methodology for the synthesis of isoindolo[1,2-α] isoquinolones based on two Parham-type cyclizations allowing the formation of the five- and six-membered nitrogenated rings from carbamate or diacylamine precursors is described. The synthetic potential of this method has been further illustrated by the total synthesis of the alkaloid nuevamine. Wiley-VCH Verlag GmbH & Co. KGaA, 2005.