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Azoles. Part 6. A convenient synthesis of polysubstituted imidazoles from 1-protected 2,4,5-tribromoimidazoles

โœ Scribed by Iddon, Brian; Khan, Nazir

Book ID
120038704
Publisher
Royal Society of Chemistry
Year
1987
Weight
446 KB
Category
Article
ISSN
1472-7781

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โœ Chi Wi Ong; Chong Ming Chen; Long Fu Wang; Po Chuen Shieh ๐Ÿ“‚ Article ๐Ÿ“… 1998 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 103 KB

Reaction of 1,6-dioxo-2,4-diene with P,Ss and Lawesson's reagent affords the 2,5-disubstituted thiophene. This reaction can take place regioselectively in the presence of BF~-etherate catalysis, useful for the synthesis of arylthiophene.