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- W2887513106 abstract "The Wolff rearrangement of alpha -aminodiazoketones derived from N-alpha-urethane protected alpha -amino acids in presence of o-nitrophenol catalyzed by silver acetate at low temperature is described. The potential utility of the well-known ketene intermediate is exploited for the synthesis of crystalline, optically pure beta -amino acid active esters. Thus the homologation of Boc-/Z-/Fmoc-alpha -amino acids to beta -amino acids with concomitant formation of the corresponding o-nitrophenyl esters has been achieved by this method. All the beta -amino acid active esters have been obtained in good yield and purity and fully characterized by IR and NMR spectra." @default.
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- W2887513106 date "2001-09-01" @default.
- W2887513106 modified "2023-09-27" @default.
- W2887513106 title "Convenient and simple homologation of N-alpha-urethane protected alpha-amino acids to their beta-homologues with concomitant o-nitrophenylesters formation" @default.
- W2887513106 hasPublicationYear "2001" @default.
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