3-(4-Bromo-1H-pyrrole-2-carbox­amido)­propanoic acid

The title compound, C₈H₉BrN₂O₃, was synthesized by condensation of β-alanine methyl ester with 4-bromo-2-(tri­chloro­acetyl)­pyrrole, followed by saponification and acidification. In the mol­ecule, all bond lengths and angles are normal. The crystal packing is stabilized by intermolecular N—H...O and O—H...O hydrogen bonds.

N-Meth­yl-3-(4-bromo-1H-pyrrole-2-carbon­yl)amino­propionitrile

The title compound, C₉H₁₀BrN₃O, was synthesized by condensation of N-meth­yl-3-amino­propionitrile with 4-bromo-2-trichloro­acetyl­pyrrole, at room temperature, in 87.3% yield. Inter­molecular N—H...O hydrogen bonds give rise to dimers of the compound.

3-[(4-Bromo-1-methyl-1H-pyrrol-2-yl­carbonyl)­amino]­propanoic acid

The title compound, C₉H₁₁BrN₂O₃, was synthesized by condensation of β-alanine methyl ester with 4-bromo-1-methyl-2-(tri­chloro­acetyl)­pyrrole at room temperature. In the crystal structure, intermolecular N—H...O and O—H...O hydrogen-bond interactions link the mol­ecules into extended ribbons parallel to the a axis.

3-[(4,5-Dibromo-1-meth­yl-1H-pyrrole-2-carbon­yl)amino]propanoic acid

The title compound, C₉H₁₀Br₂N₂O₃, was synthesized by condensation of β-alanine meth­yl ester with 4,5-dibromo-1-meth­yl-2-trichloro­acetyl­pyrrole at room temperature, followed by saponification and acidification. In the crystal structure, inter­molecular N—H...O and O—H...O hydrogen-bond inter­actions link the mol­ecules into extended ribbons parallel to the a axis.

(S)-Methyl 4-methyl-2-(1H-pyrrole-2-carboxamido)penta­noate

The title compound, C₁₂H₁₈N₂O₃, was synthesized in 87.2% yield by condensation of L-leucine methyl ester with 2-trichloro­acetyl­pyrrole at room temperature. There are two chemically equivalent and crystallographically independent molecules in the asymmetric unit. In the crystal structure, inter­molecular N—H...O hydrogen-bonding inter­actions link the mol­ecules into extended chains parallel to the c axis.