Substituent effect on acidity of substituted 2-(4-nitrobenzoylamino)alkanamidesin methanol-dimethyl sulfoxide mixtures
The dissociation constants of substituted 2-(4-nitrobenzoylamino)alkanamides, N-[2-(4-nitrobenzoylamino)aikanoyl]pyrrolidines, and N-alkyl-4-nitrobenzamides have been measured spectrophotometrically in 60 and 80% v/v DMSO. The pKA values of these N-acids are discussed from the point of view of substituents at the acetamide a-carbon atom.
Mitas, Petr,Sedlak, Milos,Kavalek, Jaromir
p. 85 - 93
(2007/10/03)
PREPARATION, 1H AND 13C NMR SPECTRA OF SUBSTITUTED 2-BENZOYLAMINOCARBOXAMIDES
Synthesis of α,α-Disubstituted α-Amino Acid Amides by Phase-Transfer Catalyzed Alkylation
α,α-Disubstituted α-amino acid amides were prepared in 17-88 percent chemical yield by the phase-transfer catalyzed alkylation of N-benzylidene α-H amino acid amides, followed by weak acidic hydrolysis of the Schiff bases.
Kaptein, Bernard,Boesten, Wilhelmus H. J.,Broxterman, Quirinus B.,Schoemaker, Hans E.,Kamphuis, Johan
p. 6007 - 6010
(2007/10/02)
Polypeptides. VII. Variations of the phenylalanyl position in the C-terminal tetrapeptide amide sequence of the gastrins.
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Gregory,Jones,Morley
p. 531 - 540
(2007/10/06)
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