43150-29-4

Upstream product

• 867-13-0 diethoxyphosphoryl-acetic acid ethyl ester 
• 70-11-1 α-bromoacetophenone 
• 945-93-7 ethyl (E)-3-phenylbut-2-enoate 
• 2293-60-9 ethyl 3-hydroxy-3-phenylbutyrate 
• 98-86-2 acetophenone 
• 1504-72-9 ethyl 3-phenylbut-2-enoate 

Downstream Products

• 92119-61-4 4-phenyl-1,5-dihydro-2H-pyrrol-2-one 

Relevant academic research and scientific papers

The synthesis, characterization and optical properties of novel 2-Acyl 6-Arylindolizines

A series of novel 2-Acyl-6-Aryl substituted indolizine derivatives was synthesized by a novel tandem reaction between 4-Acyl-pyrrole-2-carbaldehyde derivatives and ethyl 4-bromo-3-Arylbut-2-enoate under mild conditions. The compounds were characterized using IR, 1H NMR 13C NMR and HRMS. The crystal structure of 7a was determined using single crystal X-ray crystallography. The absorption results showed that compounds 7a-e presented their absorption maxima at ca. 270 nm, while compounds 7f and 7g with a larger conjugation system exhibited red-shifted absorption character (ca. 280 nm). Fluorescence spectra revealed that these compounds exhibited blue fluorescence (434-456 nm) in dilute solutions and showed quantum yields of fluorescence between 0.02 and 0.39 in dichloromethane.

Dihydropyrrolones as bacterial quorum sensing inhibitors

Bacteria regulate their pathogenicity and biofilm formation through quorum sensing (QS), which is an intercellular communication system mediated by the binding of signaling molecules to QS receptors such as LasR. In this study, a range of dihydropyrrolone (DHP) analogues were synthesized via the lactone-lactam conversion of lactone intermediates. The synthesized compounds were tested for their ability to inhibit QS, biofilm formation and bacterial growth of Pseudomonas aeruginosa. The compounds were also docked into a LasR crystal structure to rationalize the observed structure-activity relationships. The most active compound identified in this study was compound 9i, which showed 63.1% QS inhibition of at 31.25 μM and 60% biofilm reduction at 250 μM with only moderate toxicity towards bacterial cell growth.

Multifunctional Cyclopentadienes as a Scaffold for Combinatorial Bioorganometallics in [(η5-C5H2R1R2R3)M(CO)3] (M=Re, 99mTc) Piano-Stool Complexes

Multifunctional cyclopentadiene (Cp) ligands and their rhenium and 99mTc complexes were prepared by a versatile synthetic route. The properties of these Cp ligands can be tuned on demand, either during their synthesis (variation of R1) or through post-synthetic functionalization with two equal or different vectors (V1 and V2). Variation of these groups enables a combinatorial approach in the synthesis of bioorganometallic complexes. This is demonstrated by the preparation of Cp ligands containing both electron-donating and electron-withdrawing groups at the R1 position and their subsequent homo- or heterofunctionalization with biovector models (benzylamine and phenylalanine) under standard amide bond-formation conditions. All ligands can be coordinated to the fac-[Re(CO)3]+ and fac-[99mTc(CO)3]+ cores to give tetrafunctional complexes in straightforward and functional-group-tolerant procedures. The 99mTc complexes were prepared in one step, in 30 min, and under aqueous conditions from generator-eluted [99mTcO4]?.

Regioselectivity in the reaction of ethyl diethoxyphosphorylacetate with 1-aryl-2-haloalkan-1-ones: Effective synthesis of 4-aryl-2-diethoxyphosphoryl-4- oxobutanoates

The regioselectivity of the reaction of ethyl diethoxyphosphorylacetate with 1-aryl-2-haloalkan-1-ones has been investigated. It has been found that, depending on the nature of the halogen atom in 1-aryl-2-haloalkan-1-ones and the reaction conditions, alk