Pseudosymmetry and high Z′ structures: the case of rac-(2R,2′R,5′S)-2-methyl-5′-[(1R,2R,5S,5′S)-1,4,4,5′-tetra­methyl­dihydro-3′H-3,8-dioxa­spiro­[bi­cyclo­[3.2.1]octane-2,2′-furan]-5′-yl]-3,4,1′,2′,3′,4′-hexa­hydro-[2,2′-bi­furan]-5(2H)-one

Acta Crystallographica Section E: Crystallographic Communications

Piccialli, V.¹  Tuzi, A.¹  Centore, R.¹ 

[1] Dipartimento di Scienze Chimiche, Università degli Studi di Napoli 'Federico II', Complesso di Monte S. Angelo, Via Cinthia, 80126 Napoli, Italy

关键词: CRYSTAL STRUCTURE;    PSEUDOSYMMETRY;    HIGH Z' COMPOUNDS;    POLY-THF COMPOUNDS;    SPIRO COMPOUNDS;   

DOI  :  10.1107/S2056989017010805

学科分类：数学（综合）

来源: International Union of Crystallography

【 摘 要 】

The title compound, C22H34O6, is one of the products obtained by oxidation of squalene with the catalytic system RuO4(cat.)/NaIO4. It crystallizes in the P-1 space group, with four crystallographically independent mol­ecules related by a pseudo-C2 symmetry axis. The structural analysis also shows that the title compound is isomeric with two products previously reported in the literature and that are obtained by the same reaction procedure. In particular, out of the seven chiral C atoms present in the mol­ecule, the title compound shows the opposite configuration at, respectively, four and two chiral centres with respect to the isomeric compounds.

【 授权许可】

CC BY