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- W4387474683 abstract "The Gewald reaction has been well-known for more than half a century as an excellent method providing bioactive 2-aminothiophene heterocycles from the reaction of carbonyl compounds, α cyanoacetates, and elemental sulfur, in the presence of amines in stoichiometric amounts. This work describes the use of salts of boric acid as conjugate acid-base pair in a truly catalytic amount for the cyclocondensation of ketones with active methylenes like malononitrile, ethyl cyanoacetate, and benzoyl acetonitrile with sulfur to give 2-aminothiophenes via Gewald reaction. The present protocol is also applied for synthesizing Tinoridine an anti-peroxidative NSAID with an excellent yield. Additionally, the catalyst has great recyclability and reusability." @default.
- W4387474683 created "2023-10-11" @default.
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- W4387474683 date "2023-10-10" @default.
- W4387474683 modified "2023-10-16" @default.
- W4387474683 title "Truly catalytic Gewald synthesis of 2-aminothiophenes using piperidinium borate (Pip borate), a conjugate acid-base pair" @default.
- W4387474683 doi "https://doi.org/10.1055/a-2189-3334" @default.
- W4387474683 hasPublicationYear "2023" @default.
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