A phosgene and peroxide-free one-pot tandem synthesis of isatoic anhydrides involving anthranilic acid, Boc anhydride, and 2-chloro-N-methyl pyridinium iodide
摘要:
A phosgene and peroxide-free approach for the synthesis of isatoic anhydrides has been described. The synthesis involves the carbamate formation with Boc anhydride followed by in situ cyclization to afford the isatoic anhydride. The importance of this synthetic strategy is in the ease of operation, scalability, and preparation from readily available raw materials. (C) 2013 Elsevier Ltd. All rights reserved.
A phosgene and peroxide-free one-pot tandem synthesis of isatoic anhydrides involving anthranilic acid, Boc anhydride, and 2-chloro-N-methyl pyridinium iodide
摘要:
A phosgene and peroxide-free approach for the synthesis of isatoic anhydrides has been described. The synthesis involves the carbamate formation with Boc anhydride followed by in situ cyclization to afford the isatoic anhydride. The importance of this synthetic strategy is in the ease of operation, scalability, and preparation from readily available raw materials. (C) 2013 Elsevier Ltd. All rights reserved.
Transition-Metal-Catalyzed Hydroamination and Carboamination Reactions of Anthranilic Allenamides as a Route to 2-Vinyl- and 2-(α-Styryl)quinazolin-4-one Derivatives
2-Vinyl- and 2-(α-styryl)quinazolin-4-ones have been synthesized by intramolecular gold-catalyzed hydroamination and palladium-catalyzed carboamination of anthranilicallenamides, easily prepared by prototropic isomerization of the corresponding propargylamides. These procedures, which lead to N-Boc-protected quinazolinones, represent a more flexible alternative to the reported palladium-catalyzedamination