51792-35-9

Upstream product

• 4661-46-5 2-carboxybenzene diazonium chloride 
• 100990-00-9 3,4-bis-(4-methoxyphenyl)-2,5-dihydrothiophene 
• 2632-13-5 2-Bromo-4'-methoxyacetophenone 
• 20177-84-8 1-(4-methoxyphenyl)-2-[2-(4-methoxyphenyl)-2-oxo-ethylsulfanyl]-ethanone 
• 104-92-7 1-bromo-4-methoxy-benzene 
• 3141-26-2 3,4-dibromothiophene 
• 5720-07-0 4-methoxyphenylboronic acid 
• 92802-29-4 2,6-di(4-methoxyphenyl)-1,4-dithiin 

Downstream Products

• 97595-22-7 3,4-bis(4-hydroxyphenyl)thiophene 
• 65026-51-9 meso-2,3-bis(4-methoxyphenyl)butane 

Relevant academic research and scientific papers

Synthesis of Phenanthro[9,10-c]thiophenes by 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)-Promoted Cyclo-Oxidation

A new method to prepare phenanthro[9,10-c]thiophenes has been developed. In the presence of triflic acid, 3,4-diaryl thiophenes undergo 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ)-promoted cyclo-oxidation. NMR and computational studies indicate that p

Thiophene-core estrogen receptor ligands having superagonist activity

To probe the importance of the heterocyclic core of estrogen receptor (ER) ligands, we prepared a series of thiophene-core ligands by Suzuki cross-coupling of aryl boronic acids with bromo-thiophenes and we assessed their receptor binding and cell biological activities. The disposition of the phenol substituents on the thiophene core, at alternate or adjacent sites, and the nature of substituents on these phenols, all contribute to binding affinity and subtype selectivity. Most of the bis(hydroxyphenyl)-thiophenes were ERβ selective, whereas the tris(hydroxyphenyl)-thiophenes were ERα selective; analogous furan-core compounds generally have lower affinity and less selectivity. Some diarylthiophenes show distinct superagonist activity in reporter gene assays, giving maximal activities 2-3 times that of estradiol, and modeling suggests that these ligands have a different interaction with a hydrogen-bonding residue in helix-11. Ligand-core modification may be a new strategy for developing ER ligands whose selectivity is based on having transcriptional activity greater than that of estradiol.

Identification and structure-activity relationships of a novel series of estrogen receptor ligands based on 7-thiabicyclo[2.2.1]hept-2-ene-7-oxide

To develop estrogen receptor (ER) ligands having novel structures and activities, we have explored compounds in which the central hydrophobic core has a more three-dimensional topology than typically found in estrogen ligands and thus exploits the unfilled space in the ligand-binding pocket. Here, we build upon our previous investigations of 7-oxabicyclo[2.2.1]heptene core ligands, by replacing the oxygen bridge with a sulfoxide. These new 7-thiabicyclo[2.2.1] hept-2-ene-7-oxides were conveniently prepared by a Diels-Alder reaction of 3,4-diarylthiophenes with dienophiles in the presence of an oxidant and give cycloadducts with endo stereochemistry. Several new compounds demonstrated high binding affinities with excellent ERα selectivity, but unlike oxabicyclic compounds, which are transcriptional antagonists, most thiabicyclic compounds are potent, ERα-selective agonists. Modeling suggests that the gain in activity of the thiabicyclic compounds arises from their endo stereochemistry that stabilizes an active ER conformation. Further, the disposition of methyl substituents in the phenyl groups attached to the bicyclic core unit contributes to their binding affinity and subtype selectivity.

Method of treating skin related conditions

A class of 3,4-diaryl substituted thiophene, derivatives and analogs thereof, pharmaceutical compositions containing them and methods of using them to treat inflammation and inflammation-related disorders. Compounds of particular interest are defined by Formula I: wherein Y is S; wherein X is one or two substituents selected from hydrido, halo, lower alkoxycarbonyl and carboxyl; wherein R2 and R3 are independently aryl or heteroaryl; and wherein R2 and R3 are optionally substituted with one or more radicals selected from sulfamyl, alkylsulfonyl, halo, lower alkoxy and lower alkyl; or a pharmaceutically-acceptable salt thereof.

PREPARATION OF 1-PHENYLTHIO-1,3-DIENES BY REACTION OF 2,5-DIHYDROTHIOPHENES WITH BENZYNE THROUGH FRAGMENTATION OF SULFONIUM YLIDE INTERMEDIATES

The reaction of a series of 2,5-dihydrothiophenes with benzyne, generated from 2-carboxybenzenediazonium chloride, affords 1-phenylthio-1,3-dienes in good yields through the fragmentation of sulfonium ylide intermediates.

REGIOCHEMISTRY OF THERMAL EXTRUSION OF SULFUR FROM 2,6-DIARYL-1,4-DITHIINS YIELDING 2,5- AND 3,4-DIARYLTHIOPHENES

The predominant formation of 2,5-diarylthiophenes over the 3,4-diaryl isomers by thermolyses of a series of 2,6-diaryl-1,4-dithiins supports that this sulfur extrusion reaction proceeds by the mechanism involving the valence isomerization to thiocarbonyl