Crystal structure of (+)-methyl (E)-3-[(2S,4S,5R)-2-amino-5-hydroxymethyl-2-trichloromethyl-1,3-dioxolan-4-yl]-2-methylprop-2-enoate

In the title compound, C₁₀H₁₄C_l3NO₅, the five-membered dioxolane ring adopts an envelope conformation. The C atom at the flap, which is bonded to the hydroxymethyl substituent, deviates from the mean plane of other ring atoms by 0.357(5)Å. There are two intramolecular hydrogen bonds (O-H⋯N and N-H⋯O) between the hydroxy and amino groups, so that O-and N-bound H atoms involved in these hydrogen bonds are each disordered with equal occupancies of 0.50. The methyl 2-methylprop-2-enoate substituent also shows a disordered structure over two sets of sites with refined occupancies of 0.482(5) and 0.518(5). In the crystal, molecules are connected into a dimer by an O-H⋯O hydrogen bond. The dimers are further linked by N-H⋯O, C-H⋯N and C-H⋯O interactions, extending a sheet structure parallel to ( 01).