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

Crystal structure of N′-((1E,2E)-4-(7-methoxy-2-oxo-2H-chromen-8-yl)-2-methylbut-2-en-1-ylidene)-4-methylbenzenesulfonohydrazide, C22H22O5N2S

C22H22O5N2S, monoclinic, P21/n (no. 14), a = 8.1080(2) Å, b = 14.4763(4) Å, c = 18.2819(5) Å, β = 95.270(3)°, V = 2136.75(10) Å3, Z = 4, R gt(F) = 0.0488, wR ref(F 2) = 0.1220, T = 291 K.

Crystal structure of N'-[(E)-(1S,3R)-(3-isopropyl-1-methyl-2-oxo-cyclo-pent-yl)methyl-idene]-4-methyl-benzene-sulfono-hydrazide

The title compound, C17H24N2O3S, was synthesized in order to determine the relative configuration of the corresponding β-keto aldehyde. In the U-shaped mol-ecule, the five-membered ring approximates an envelope, with the methyl-ene C atom adjacent to the quaternary C atom being the flap, and the methyl and isopropyl substituents lying to the same side of the ring. The dihedral angles between the four nearly coplanar atoms of the five-membered ring and the flap and the aromatic ring are 35.74 (15) and 55.72 (9)°, respectively. The bond angles around the S atom are in the range from 103.26 (12) to 120.65 (14)°. In the crystal, mol-ecules are linked via N-H⋯O hydrogen bonds, forming a chain along the a axis.