7,12-Diphenyl-14H-naphto[2,3-b]thioxanthen-14-one (TX-DPA) was synthesized and characterized as a potential visible light photoinitiator for radical polymerization. TX-DPA has an excellent absorption character in the region photophysical properties of were investigated by fluorescence laser flash photolysis studies photopolymerization methyl methacrylate air atmosphere helped to understand initiation mechanism TX-DPA. Moreover, it is possible that production singlet oxygen from quenching...

The synthesis of new 2,3,5,6-aryl substituted tetrahydro-2H-pyrazolo[3,4-d]- thiazoles 4a-j as potential biologically active compounds by the cyclocondensation phenyl hydrazine with 5-arylidene derivatives 2a-j 2,3-disubstituted-1,3- thiazolidin-4-ones 1a-e is reported.

ABSTRACT Thioxanthonation of fluorenone resulted in a new visible light initiator namely, indeno [1,2‐ b ]thioxanthene‐7,13‐dione (TX–FN). The detailed photophysical properties the singlet and triplet excited states TX–FN are reported using steady‐state absorption, fluorescence, phosphorescence, as well laser flash photolysis techniques. Photoinitiated polymerization MMA with CQ has been investigated presence absence co‐initiator (MDEA). Additionally, Photo‐DSC studies were performed both...

Oleanolic acid (OA) is a known natural compound with many important biological activities. Thirteen oleanolic derivatives linked at C-3 and C-28 were synthesized their structures confirmed by 1H- 13C NMR mass spectral analyses. Among them, compounds 4, 6, 8-10, 12, 13 for the first time. They evaluated cytotoxic activity. showed proliferative effect low concentrations while was observed high in dose dependent manner.We have 1 2 from reaction of methyl iodide OA. Compound reduced LiAlH4 to...

Palladium-catalyzed hydroarylations and additional domino reactions of aza- bicyclic tricyclic norbornene derivatives were investigated a series new epibatidine analogues synthesized.

This study is in continuation of our work related to 5‐pyrazolones aimed at synthesizing new heterocycles with dyeing and anticipated biological properties. Compounds 1 2 ; 1‐methyl‐ or 1‐(2,4‐dimethylphenyl)‐3‐phenyl‐1 H ‐pyrazol‐5(4 )‐one, 3 1‐methyl‐5‐oxo‐3‐phenyl‐4,5‐dihydro‐1 ‐pyrazole‐4‐carbaldehyde 4 2‐(1‐methyl‐5‐oxo‐3‐phenyl‐1 ‐pyrazol‐4(5 )‐ylidene)‐3‐phenylthiazolidin‐5‐one were prepared subjected diazotation aromatic amines diamines. New azo ( 1a – c , 2a, b 3a 4a ) bisazo dyes...

New azo- and bisazo-5-pyrazolone dyes have been synthesised by azo coupling of various arylamines aryl diamines with 5-pyrazolones: 1-methyl-3-phenyl-1 H-pyrazol-5(4 H)-one, 1-(4-chlorophenyl)-3-isopropyl-1 H)-one 3-isopropyl-1-(4-methoxyphenyl)-1 respectively. All new characterised FTIR, 1 H, 13 C NMR UV-Vis spectral studies GC/MS LC/MS analyses. FTIR H confirmed the existence hydrazo-tautomeric forms in solid liquid states,

Article TRANSFORMATIONS OF 4-N-ARYLAMINO-4-(8-QUINOLINYL)-I-BUTENES AND 3-ARYL-2-(8-QUINOLINYL)-4-THIAZOLIDINONES was published on April 1, 2001 in the journal Heterocyclic Communications (volume 7, issue 2).

The Schiff bases derived from quinoline-8-carbaldehyde and substituted aromatic amines were used in the synthesis of C-8 quinolines. 3-Aryl-2-(8-quinolinyl)-4-thiazolidinones prepared obtained aldimines by means cyclocondensation mercapto acids. A series 4-N-arylamino-4-(8-quinolinyl)-1-butenes was synthesized through addition Grignard reagent (allylmagnesium bromide) to double bond C=N these aldimines. structure compounds established on basis their elemental analyses spectral data.

The first example of a pi,sigma domino-Heck reaction under concomitant rearrangement the tetracyclic allylcyclopropane endo,exo-bishomobarrelene (5) is reported; stereoselective proceeds via an intramolecular insertion primarily-formed carbopalladation intermediate into strained cyclopropane C-C sigma-bond, giving 9.

The activating effects of the benzyl and allyl groups on SN2 reactivity are well-known. 6-Chloromethyl-6-methylfulvene, also a primary, allylic halide, reacts 30 times faster with KI/acetone than does chloride at room temperature. latter result, as well new experimental observations, suggests that fulvenyl group is particularly in reactions. Computational work identity reactions, e.g., chloride– displacing ammonia ammonia, shows negatively charged transition states (tss) activated by...

Nowadays modified textiles, especially UV-protective, antibacterial and antimicrobial ones, have become the focus of great interest. In this study, several new UV absorbers, bis(indolyl)methane derivatives, were synthesized grafted onto polyvinyl alcohol polymer (PVA). Their application properties on cotton-based textile materials determined; protection factor values fabrics measured (UPF); features tested.

Abstract The CC coupling of the two bicyclic, unsaturated dicarboximides 5 and 6 with aryl heteroaryl halides gave, under reductive Heck conditions, C ‐aryl‐ N ‐phenyl‐substituted oxabicyclic imides 7a – c 8a ( Scheme 3 ). Domino‐ reactions 5, , 1b or iodides phenyl‐ (trimethylsilyl)acetylene also proved feasible giving 8, 9 10a respectively 4 Reduction LiAlH (→ 11 ) followed by arylation reduction NaBH 13 open a new access to bridged perhydroisoindole derivatives 12a b 14a prospective...