Crystal structure of ( E)- N′-{[(1 R,3 R)-3-isopropyl-1-methyl-2-oxo­cyclo­pent­yl]methyl­idene}-4-methyl­benzene­sulfono­hydrazide

Abstract

The title compound, C ₁₇H ₂₄N ₂O ₃S, was synthesized in order to determine the relative configuration of the corresponding β-keto aldehyde. In the U-shaped mol­ecule, the five-membered ring approximates an envelope with the methyl­ene atom adjacent to the quaternary C atom being the flap. The dihedral angles between the four nearly coplanar atoms of the five-membered ring and the flap and the aromatic ring are 38.8 (4) and 22.9 (2)°, respectively. The bond angles around the S atom are in the range 104.11 (16)–119.95 (16)°. In the crystal, mol­ecules are linked via N—H⋯O by hydrogen bonds, forming a chain along the a-axis direction.