Thiophenes
نویسندگان
چکیده
منابع مشابه
Room-Temperature Direct β-Arylation of Thiophenes and Benzo[b]thiophenes and Kinetic Evidence for a Heck-type Pathway
The first example of a regioselective β-arylation of benzo[b]thiophenes and thiophenes at room temperature with aryl iodides as coupling partners is reported. This methodology stands out for its operational simplicity: no prefunctionalization of either starting material is required, the reaction is insensitive to air and moisture, and it proceeds at room temperature. The mild conditions afford ...
متن کاملThiophenes of Tagetes Flowers and Partial Purification of Xanthophyll Esters
Lutein is a health promoting xanthophyll that may be extracted from marigold flowers. But the plant is known also for biosynthesis of phototoxic polythiophenes. Extracts of flowers of some Tagetes species grown in Belgorod (RF) T. erecta L. (cv. Gavaii) , T. patula L. (cv. Petit orange), T. tenuifolia Cav. (unknown cv.), and T. lucida Cav. were investigated by thin layer chromatography (TLC) an...
متن کاملActivation of Thiophenes by Superacids: Protonation and Polymerization
Two aspects of thiophene chemistry are of current interest in materials chemistry. Polythiophenes are under intense study for possible applications in electronics and photonics,1 and metal-thiophene interactions are relevant to the catalytic hydrodesulfurization (HDS) process.2,3 This communication presents studies at the interface of these otherwise distinct topics, resulting from an examinati...
متن کاملFacilitated transport of thiophenes through Ag2O-filled PDMS membranes
Facilitated transport membranes of polydimethylsiloxane (PDMS) with silver oxide (Ag2O) as the carrier were prepared and used for the separation of thiophenes/n-octane mixtures. The effect of the degree of Ag2O loading, feed temperature on the pervaporation properties of Ag2O-filled membranes was investigated experimentally. Ag2O-filling leads to an increase in selectivity to thiophenes but a d...
متن کاملPalladium-catalysed direct arylation of thiophenes tolerant to silyl groups.
The palladium catalysed 5-arylation of 2-(trimethylsilyl)thiophene with aryl bromides via C-H bond functionalisation allows the synthesis of arylated silylthiophenes in only one step.
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ژورنال
عنوان ژورنال: Synthesis
سال: 2006
ISSN: 0039-7881,1437-210X
DOI: 10.1055/s-2006-958168