Ethyl 1'-methyl-2-oxo-4'-[(3aR,5R,5aS,8aS,8bR)-2,2,7,7-tetra-methyl-tetra-hydro-3aH-bis-[1,3]dioxolo[4,5-b:4',5'-d]pyran-5-yl]-2H-spiro-[ace-naphthyl-ene-1,2'-pyrrolidine]-3'-carboxyl-ate.

ABSTRACT: In the title mol-ecule, C30H35NO8, the ace-naphthyl-enone moiety, two atoms of a methyl pyrrolidine ring (N and C atoms) and four atoms of an ethyl acetate moiety (two C and two O atoms) are disordered over two sets of sites in ratio 0.532?(7):0.468?(7). The three C atoms of a di-meth-oxy-ethane ring and dioxolane ring attached with two methyl groups are disordered over two sets of sites in 0.66?(2):0.34?(2) and 0.62?(2):0.38?(2) ratios, respectively. The major and minor components of the ace-naphthyl-ene ring are essentially planar (r.m.s. deviations = 0.0254 and 0.0436?Å, respectively). The major and minor components of the pyrrolidine ring adopt C-envelope conformations with C atoms displaced by 0.492?(11) and 0.595?(7)?Å from the remaining ring atoms. One of the dioxolane rings is disordered with its major component in an envelope conformation [C displaced by 0.511?(11)?Å] and the minor fraction is more or less planar with an r.m.s. deviation of 0.070?Å. The other dioxolane ring is in an envelope conformation, with a C atom displaced by 0.438?(3)?Å from the remainder of the ring atoms. The crystal packing features C-H?O inter-actions, which generate C(9) chains.

SUBMITTER: Jagadeesan G 

PROVIDER: S-EPMC3790386 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature