Tert-Butyl N-((1S)-2-hydroxy-1-{N′-[(E)-2-hydroxy-4-methoxybenzyl- idene]hydrazinecarbon-yl}eth-yl)carbamate

Abstract

The molecule of the title compound, C 16H 23N 3O 6, is twisted about the chiral C atom with the dihedral angle formed between the amide residues being 76.9 (3)°. Overall, the molecule is curved with the terminal organic groups lying to the same side. The conformation about the imine bond [1.291 (5) Å] is E and an intra-molecular O - H⋯N hydrogen bond generates an S(6) ring. In the crystal, O - H⋯O and N - H⋯O hydrogen bonds involving the hy-droxy, amine and carbonyl groups lead to the formation of supra-molecular layers, which stack along the c-axis direction.