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- W2949422711 abstract "A new, one-step and racemization-free synthesis of phthaloyl derivatives of α-amino carboxamides is described. Under ultrasound, α-amino carboxamides and dipeptide derivatives react with monomethyl phthalate in the presence of BOP, ZnCl2 and i-Pr2NEt to afford the corresponding N α -phthaloyl α-amino carboxamides or dipeptides in good to excellent yields. Cyclization of the intermediate N α -[(o-methoxycarbonyl)benzoyl]amino carboxamides to the desired products was very slow when the reaction was conducted either in the absence of ZnCl2 and/or without sonication, but the process was greatly accelerated when both ZnCl2 and ultrasound were used." @default.
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- W2949422711 date "2001-01-01" @default.
- W2949422711 modified "2023-10-18" @default.
- W2949422711 title "Ultrasound and ZnCl2 Promoted Synthesis of Phthaloyl Derivatives of α-Amino Carboxamides" @default.
- W2949422711 doi "https://doi.org/10.1055/s-2001-9756" @default.
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