A convenient approach towards 2- and 3-aminobenzo[b]thiophenes
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Add time:09/24/2019 Source:sciencedirect.com
Reaction of 1-(2-chloro-5-nitrophenyl)ethanone via Willgerodt–Kindler route with primary or secondary amines and sulfur allows a simple, efficient one-pot synthesis of 3-aminobenzo[b]thiophenes. Base-catalyzed transformation of 4-(2-chloro-5-nitrophenyl)-1,2,3-thiadiazole in the presence of primary and secondary amines offers a convenient approach towards 2-aminobenzo[b]thiophenes.
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