| 11828119 |
Ziyat H, Ait Itto MY, Ait Ali M, Karim A, Riahi A, Daran JC: Stereochemistry of two new polyfunctionalized gem-dihalocyclopropanes. Acta Crystallogr C. 2002 Feb;58(Pt 2):o90-3. Epub 2002 Jan 23.
The two new gem-dihalogenocyclopropanes (1'S,3R)-3-(2',2'-dichloro-1'-methylcyclopropyl)-6-oxoheptanoic acid, C (11) H (16) Cl (2) O (3), (2), and (1'S,3R)-3-(2',2'-dibromo-1'-methylcyclopropyl)-6-oxoheptanoic acid, C (11) H (16) Br (2) O (3), (3), are isostructural. Both present two stereogenic centers at C1' and C3. The absolute configuration was determined by X-ray methods. The cyclopropyl rings are unsymmetrical, the shortest bond being distal with respect to the alkyl-substituted C atom. |
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