STRUCTURE OF RBAMOYL-3-PHENYL-(1,2-DIDEOXY-ALPHA-D-GLUCOFURANO) [1,2-D]IMIDAZOLIDIN-2-ONE

The compound (C14H17N3O6) crystallizes in the monoclinic space group P 2(1) with a = 13.640(3) angstrom, b = 4.692(1) angstrom, c = 11.299(3) angstrom, beta = 93.09(1)degrees, (V = 722.1(3) angstrom3; Z = 2; D, = 1.487 Mgm-3, lambda(MoK(alpha)) 0.7107 angstrom, u = 0.11 mm-1, F(00 0) = 340, T = 293 K). The structure was solved by direct methods and r efined by full matrix least squares method to a final R = 0,039 (R(w) = 0.040). The furano ring adopts a perfect envelope E4 conformation wi th the substituent C71 in equatorial and O6 in axial position. The imi dazolidine ring is planar and the substituents O2, O31 and C11 are at 0.028, -0.041 and -0.200 angstrom from this plane. The mean planes of furano and imidazolidine rings make an angle of 108.6(1)degrees. The p ertinent dihedral angles are 7.5(1)degrees (phenyl-imidazoline); 115.9 (1)degrees (phenyl-furane), and 7.1(3)degrees (imidazoline-amide). The molecules are stakked along the b axis forming two infinite chains th rough an intermolecular H-bond O71 ... O6.