Crystal structure of (-)-methyl (R,E)-4-[(2R,4R)-2-Amino-2-Trichloromethyl-1,3-dioxolan-4-yl]-4-hydroxy-2-methylbut-2-enoate Oishi Takeshi

In the title compound, C₁₀H₁₄Cl₃NO₅, the five-membered dioxolane ring adopts an envelope conformation with the C atom bonded to the butenoate side chain as the flap. It deviates from the mean plane of the other atoms in the ring by 0.446 (6) Å. In the crystal, molecules are connected by O-H·O hydrogen bonds into helical chains running along the b-Axis direction. The chains are linked into a sheet structure parallel to (001) by an N-H·O hydrogen bond. These classical hydrogen bonds enclose an R ⁴ ₄ (24) graph-set motif in the sheet structure. Furthermore, a weak intermolecular C-H·Cl interaction expands the sheet structures into a three-dimensional network.