Crystal structure of 3-C-(N-benzyl­oxy­carbon­yl)amino­methyl-3-de­oxy-1,2:5,6-di-O-iso­propyl­idene-α-d-allo­furan­ose

The title compound, C(21)H(29)NO(7) (1) [systematic name: benzyl ({(3aR,5S,6R,6aR)-5-[(R)-2,2-dimethyl-1,3-dioxolan-4-yl]-2,2-di­methyl­tetrahydro­furo[2,3-d][1,3]dioxol-6-yl}meth­yl)carbamate], consists of a substituted 2,2-di­methyl­tetra­hydro­furo[2,3-d][1,3]dioxolane skeleton. The furan­ose ring adopts an envelope conformation close to C (3)-exo, where the C atom substituted by the benzyl carbamate group is the flap. The fused dioxolane ring also adopts an envelope conformation, as does the terminal dioxolane ring, with in each case an O atom as the flap. In the crystal, mol­ecules are linked by N—H⋯O and C–H⋯O hydrogen bonds, forming chains propagating along the b-axis direction.